Abstract
Can instructional quality be measured using TIMSS items on how often certain instructional practices are used in the mathematics classroom? We focused on three instructional practices that have been the topics of longstanding debates in the educational literature: memorizing formulas, listening to the teacher, and relating mathematics to daily life. In a multilevel multiple regression analysis, we examined how classlevel responses to these items predicted mathematics achievement. In Sweden, across four waves of TIMSS, relating to daily life was a negative predictor of achievement, whereas memorizing formulas and listening to the teacher were positive predictors. This was also the typical pattern of results across all countries participating in two waves of the international TIMSS. Our findings are in line with certain positions on the abovementioned debates. Although conclusions are limited by the correlational nature of the data, we argue that TIMSS is a promising tool for evaluating the effectiveness of different instructional practices. We also suggest several improvements.
Introduction
Teachers seem to play a fundamental role in individual students’ success in further schooling as well as in life (Nye et al. 2004). Reviews of research on teacher competence show broad agreement that teachers need competence in three overarching areas: social competence, which involves showing respect for students and interest in their work; regulative competence, which involves being able to establish and uphold a productive classroom environment and get students involved in the work; and didactical competence, which involves knowing the subject matter and how it can be presented and organized for student learning in a flexible way (Nordenbo et al. 2008). Mathematics is one of the core subjects. To be able to measure and systematically improve the didactical competence of presenting and organizing for student learning in mathematics, the education community needs a clear picture of what quality teaching in mathematics looks like. On this grainsize of instructional quality, however, no consensus has yet emerged. Instead, the question of how mathematics should best be presented and organized is surrounded by several longstanding controversies (e.g., Sweller et al. 2007). It is important to find ways to move forward on these issues.
An available source of data is provided by the international largescale assessments TIMSS and PISA. TIMSS is conducted every 4 years by IEA (International Association for the Evaluation of Educational Achievement). PISA is conducted every 3 years by OECD (the Organisation for Economic Cooperation and Development). Great efforts are invested in conducting these assessments, and their results tend to receive attention from policymakers and the press. They are therefore of great importance. The assessments involve a mathematics test to students as well as questionnaires to various parties. Such questionnaires may provide measures of teachers’ use of various instructional practices, which can then be related to student outcomes (Nilsen and Gustafsson 2016). The aim of the present paper is to examine what such analyses could tell us about what quality teaching in mathematics looks like.
The advantage of TIMSS over PISA
The TIMSS and PISA studies are designed somewhat differently. TIMSS samples entire classes and links students to the teacher/classroom level. Moreover, TIMSS gathers questionnaire data from both students and teachers. The PISA design is different in that the teacher/classroom level is not represented. PISA samples individual students, not classes, and gathers questionnaire data only from students. As student data from PISA cannot be aggregated on the teacher level, analyses of the relation between student achievement and student responses could be strongly confounded by the individual response style of students. For these reasons, the TIMSS design seems better suited to yield useful information on what quality teaching looks like.
Two ways to approach instructional quality in TIMSS data
The remainder of the paper will focus on what TIMSS data can tell us about the relations between instructional practices, instructional quality, and student achievement. We shall here describe two different ways of approaching this question. One approach, which we will refer to as “normative”, takes as its starting point that we already know which instructional practices constitute quality teaching in mathematics. By measuring how much these quality practices are used in the classroom, researchers can then get a measure of the quality of the instruction in that classroom. This measure of instructional quality can then be used for various analyses. For instance, researchers may wish to examine the effect on instructional quality of other variables like teacher training and teacher experience. Or researchers may be interested in the importance of instructional quality for student achievement, relative other factors such as students socioeconomic background, school resources, etc.
IEA, the organization behind TIMSS, endorses the normative approach by providing an “Instruction to Engage Students in Learning Scale”. This scale is based on six items in the teacher questionnaire. These items ask teachers how often they use certain instructional practices in class (e.g., “How often do you relate the lesson to students’ daily lives?”). According to IEA (2011, Exhibit 6), the scale formed by these six items has Cronbach’s alpha values (one for each country) around 0.6, which indicates nearadequate internal consistency. However, the same table from IEA (2011) reports that the scale has practically zero correlation to student achievement (Exhibit 6 in IEA 2011). A similar null result was recently reported by Blömeke et al. (2016).
As students’ mathematics achievement is not correlated with this normative measure of instructional quality, should we conclude that the quality of instruction does not matter? Blömeke et al. (2016) do not draw this conclusion. Instead, they voiced concerns that the measure obtained by the Instruction to Engage Students in Learning Scale may suffer from teachers’ selfreports being unreliable. There is indeed evidence that teachers’ selfreports of the instruction they use tend to be less reliable than the reports of their students (Kunter and Baumert 2006). This problem could, and should, be solved by using student reports instead.
The normative approach has another problem, however. Namely, the starting point—that we already know which instructional practices constitute quality teaching in mathematics—is questionable. Perhaps the Instruction to Engage Students in Learning Scale includes some instructional practices that are, in fact, not so beneficial to student achievement. For instance, as we discuss in detail below, it is questionable whether the practice of relating the lesson to students’ daily life has generally beneficial effects on students’ learning of mathematics.
As an alternative, we advocate a “descriptive” approach to TIMSS data on instructional practices. Because of the longstanding controversies in the field, it seems premature to take for granted that some practices constitute quality teaching. Instead, researchers could use the data provided by TIMSS to examine the independent effect of each instructional practice on student achievement. An instructional practice should only be regarded as a characteristic of quality teaching if there is evidence that it generally has a positive effect on student achievement.
Instructional practices in eighth grade covered by the TIMSS student questionnaire
Eighth grade student reports of instructional practices were gathered in the 2003 and 2007 waves of TIMSS. Unfortunately, questions on instructional practices were not generally included in the student questionnaires in the last two waves (2011 and 2015) of TIMSS, but a few items were nonetheless included in the Swedish versions of these questionnaires. We focus on the following three items:

1.
We listen to the teacher give a lecturestyle presentation.

2.
We relate what we are learning in mathematics to our daily lives.

3.
We memorize formulas and procedures.
We shall now review how the instructional practices covered by these three items have been the topics of longstanding debates in the educational literature.
The role of teachers in instruction
Item 1 asks students how often they listen to the teacher giving a lecturestyle presentation. This item relates to the debate in mathematics education research on socalled studentcentered approaches, typically building on constructivist ideas, versus approaches stressing that content should be clearly and explicitly presented by the teacher. In the former type of approach, as phrased by Stein and colleagues, the role of the teacher is then expected to change “from ‘dispenser of knowledge’ and arbiter of mathematical’ correctness’ to an engineer of learning environments in which students actively grapple with mathematical problems and construct their own understandings” (Stein et al. 2008, p. 315). Problemsolvingoriented approaches have at times been highly influential in developmental work in mathematics education, and in standards and curricula (NCTM 1989; Schoenfeld 1992). Research indicates that such approaches may work well (GinsburgBlock and Fantuzzo 1998; Gravemeijer 1997). However, there is also ample support for instructional designs that build on opposing principles. For lowachieving students in particular, socalled explicit instruction seems beneficial (Kroesbergen et al. 2004; Gersten et al. 2009). Similar to problemsolving approaches, explicit instruction typically includes giving students opportunities to solve problems in groups and communicate their problemsolving strategies, but in contrast to problemsolving approaches it is emphasized that the instruction should include clear teacher thinkalouds, and beforehand explanations of how a particular class of problems should be solved.
The cognitive underpinnings of the competing approaches have been addressed in some research, with a focus on the role and limitations of working memory. It has been argued that instruction whereby students are to learn from complex task situations places overly high demands on their working memory (Sweller et al. 2007). According to a counterargument, high cognitive load can be beneficial to learning when the task or activity is set up to appropriately focus the learner’s attention (Schmidt et al. 2007). In certain simple situations, it has also been confirmed that learning under creative conditions, in which the student is to find the solution without guidance, may have a more sustained learning effect than when the learning is guided to the solution followed by practice (Jonsson et al. 2014).
In sum, the two classes of approaches to classroom practices suggest different perspectives on the learning tasks, the role of the students as well as the role of the teachers in classroom practices. Therefore, no clear guidelines have yet been established as to the question of how much teachers should lecture.
Mathematics and students’ daily lives
Item 2 asks students how often they relate what they are learning in mathematics to their daily lives. Some of the most influential ideas in mathematics education for the last handful of decades concern the connection of mathematics to everyday experience. A prime example of this is the theory of Realistic Mathematics Education (RME), developed by Freudenthal and colleagues, according to which students should be active participants in the educational process of developing mathematical tools and insights themselves within familiar contexts (Freudenthal 1968; Van den HeuvelPanhuizen and Drijvers 2014) through a teacherled process, termed guided reinvention (Gravemeijer 1999). These ideas have influenced standards, national curricula and international assessment frameworks (Boesen et al. 2014; NCMT 1989; OECD 1999). However, it has also been established that excessive reliance on students’ everyday experience can have negative effects on their mathematical development. For example, students may have difficulty recognizing the mathematics in the everyday situations that are discussed, and may not be certain about when it is appropriate to use knowledge based on such situations and when such knowledge should be ignored (Zevenbergen and Lerman 2001; Gellert and Jablonka 2009; Boaler 1994). Cooper and Dunne (1998) used sociological theory to explain how the development of typically informal rules of education applies to the case of using realistic examples in mathematics education. Using national mathematics test data, they showed that workingclass children were almost twice as likely as servingclass children to answer mathematical queries involving realistic content by only referring to everyday knowledge; however, more recent research has indicated that the systematic variation occurred on the level of school class rather than social class (Schuchart et al. 2015). This indicates that the way students understand everyday mathematical context is determined primarily by the teaching. There is also experimental work showing that everydaybased explanation models can have negative effects on students’ ability to use newly introduced mathematical concepts in new contexts (Kaminski et al. 2008).
In sum, it is not clear when and under what conditions it is an effective teaching technique to connect the mathematics to be learned to students’ daily lives. Welldeveloped teaching models that stress everyday experiences are typically quite intricate, involving specifically constructed teaching sequences in which the teacher plays an active role. In addition, both case studies and some largerscale studies show that reliance on everyday examples can cause confusion over what counts as mathematics in school.
Memorizing formulas and procedures
Item 3 asks students how often they memorize formulas and procedures. One of the most fundamental discussions in mathematics education concerns the extent to which the teaching should focus on students’ application and memorization of rules and procedures. The prominence given to the practicing and memorization of rules and formulas in mathematics education is central to what has been called the Math Wars in the US (Schoenfeld 2004). The debate goes back hundreds of years. Typically, memorization and application of procedures are contrasted with understanding the relation between concepts and when to apply them. An influential theory in this area is the characterization of instrumental understanding and relational understanding (Skemp 1979). Instrumental understanding should be understood here as knowing, for a given problem, the procedures or rules for how to solve it, but not necessarily knowing why these rules work or how they relate to each other. Relational understanding denotes having a conceptual structure from which various methods and ideas can be inferred. Many other theories in mathematics education try to capture similar dichotomies, one being that of procedural and conceptual knowledge (Hiebert 2013). There is also research that discusses the interdependence of procedural and conceptual knowledge (Baroody et al. 2007).
Several of the principal standards and curricular frameworks that have been internationally influential have emphasized relational understanding by, for instance, focusing on ideals like conceptual understanding (Kilpatrick et al. 2001) or on connections as a central mathematical notion (NCTM 2000). Moreover, a greater emphasis on connections between concepts and methods in Japanese lessons versus a greater emphasis on procedural practice in US lessons was hypothesized to be one of the reasons why Japanese students outperformed US students in international assessments (Stigler and Hiebert 1999). Throughout the 1980s and 1990s, many proponents of teaching for conceptual understanding referred to developments in cognitive psychology in their arguments, declaring constructivist views on learning whereby it was argued that student activities should primarily grow out of problem situations instead of computational training (NCTM 1989). Researchers in cognitive science and psychology have declared opposite views in many cases, arguing that some of the fundamental principles in mathematics education research were, if anything, a misapplication of current views in cognitive science. To exemplify this, a position they attack is the view that mathematics should be learned in contexts and in a holistic manner, whereby it does not simply become an accumulation of concepts and skills. What cognitive science instead indicates (according to Anderson et al. 1995) is that mathematics should be decomposed into small components that can be studied and practiced in decontextualized settings; it is then the role of the educator to create sequences of tasks and activities that give the student the opportunity to create a larger whole from these components. Such ideas have also been implemented in instructional software, through socalled tutor programs.
Thus, just as with the previously discussed topics, no consensus has been reached on how much emphasis should be placed on memorizing formulas and procedures.
Specific research questions
To summarize the review above, different researchers have different opinions on what represents instructional quality. Roughly speaking, researchers with their roots in the reform movement are likely to argue that quality teaching connects mathematics to students’ daily lives, uses a problemsolving approach, and emphasizes connections between ideas rather than the memorization of formulas. On the other hand, researchers with their roots in psychology and cognitive science are likely to argue that quality teaching has a focus on the formal mathematical notions, involves explicit instruction whereby the teacher shows students how to solve classes of problems, and has students focusing on practicing and memorizing rules and worked examples, rather than working with problems for which they have not been presented with a solution strategy. Given these controversies, it seems very worthwhile to use largescale assessments to shed more light on the effectiveness of these instructional practices.
Hence, our primary research aim is to estimate the independent effect of each instructional practice on students’ mathematics achievement. Such estimates will indicate answers to the question whether these instructional practices do or do not represent quality teaching (although with several caveats due to data being correlational in nature, as discussed at the end of the paper). We also want to know whether the answers to this question hold in general, or whether they depend on time and place.
Method
Datasets
We used data from the international eighth grade TIMSS studies of 2003 and 2007, which can be downloaded from the IEA web site. These datasets include 45 and 50 countries, respectively (as well as several benchmark participants, excluded in this study). We also used data from the Swedish eighth grade TIMSS studies of 2011 and 2015, which we obtained from the Swedish National Agency for Education.
Outcome measure
To measure student achievement, TIMSS uses an elaborate method that is described in detail elsewhere (Mullis et al. 2012). In brief, the mathematics assessment is based on a pool of about 200 items. Each student responds to only a subset of these items, following a rotating matrixsampling design. To obtain comparable achievement scores for all students, an imputation method is used. This method generates a set of five “plausible values” for each student. This range of values provides a means of assessing the uncertainty in results that arises from the imputation of scores. The scale of achievement scores was calibrated in 1995 such that the mean mathematics achievement was 500 and the standard deviation was 100. In each subsequent wave, the scale has been calibrated to be comparable with that of the 1995 wave. As the outcome measure, we used the set of five plausible values of student achievement in mathematics.
Measures of instruction
In addition to assessing student achievement, TIMSS includes questionnaires to students, teachers, and school leaders (Foy et al. 2013). The eighthgrade student questionnaires of TIMSS 2003 and 2007, as well as Swedish TIMSS 2011 and 2015, included the question “How often do you do these things in your mathematics lessons?”, followed by a list of items. Students gave their responses on a fourpoint scale: Every or almost every lesson (coded 1); About half the lessons (coded 2); Some lessons (coded 3); Never (coded 4). Individual responses to the three focal items shall be referred to as variables Listen (“We listen to the teacher give a lecturestyle presentation”), Daily (“We relate what we are learning in mathematics to our daily lives”), and Memo (“We memorize formulas and procedures”). For each of the focal items we calculated the average response in each participating class. These classlevel measures of instruction are the main independent variables of our study. We shall refer to them as ClassListen, ClassDaily, and ClassMemo. In TIMSS 2003, only the first two classlevel measures of instruction could be calculated (ClassListen and ClassDaily) as the Memo item was not included. In TIMSS 2007 and in Swedish TIMSS 2011 and 2015, all three classlevel measures of instruction could be calculated.
Following Lüdtke et al. (2006), we gauged the reliability of classmean ratings of instruction by calculating the intraclass correlation coefficients known as ICC(1) and ICC(2). In the pooled Swedish data, these coefficients were lowest for the item Daily, ICC(1) = 0.04, ICC(2) = 0.47; somewhat higher for Memo, ICC(1) = 0.07, ICC(2) = 0.59; and higher still for Listen, ICC(1) = 0.18, ICC(2) = 0.81. The range and level of these ICC(2) values are similar to those found in other studies of student ratings of instruction (Lüdtke et al. 2006; Wagner et al. 2016).
Control variables
It is well known that socioeconomic background tends to be a highly important predictor of student achievement. Following Blömeke et al. (2016), we included as a control variable the response to the item “About how many books are there in your home?”, with a fivepoint response scale from None or very few (0–10 books) (coded 1) to Enough to fill three or more bookcases (more than 200) (coded 5). This item is a commonly used proxy of socioeconomic background. We shall refer to this variable as SES. To control for peer effects we also calculated the average SES in each class, referred to as ClassSES. We also controlled for student gender, coded 1 for boy and 2 for girl, and referred to as Gender.
Finally, we obtained from the Swedish National Agency for Education an extension of the Swedish dataset for TIMSS 2015 that also included the participating students’ scores on the national test in mathematics that they took in sixth grade, in the spring of 2013. We shall refer to this score as TestGr6 and to the classaverage score as ClassTestGr6. The five subtests of the national test in sixth grade are carried out during 2 months in the spring of the pupils’ sixths school year. The subtests comprises a verbal test of mathematical reasoning administered in a group settings of 3–4 students (30 min), a test of routine tasks to be solved without calculator (max 60 min), two tests with word problems revolving around a thematic story (max 60 and 80 min respectively) and a test with one complex task (max 60 min). For the 2013 test, the maximum test score was 122 (Petterson and Thisted 2013; PRIMgruppen, 2016).
Missing data
Frequencies of missing data on the selected variables (three instruction items and students’ Gender, SES, and, in Swedish TIMSS 2015, TestGr6) were generally low, at most a few percent. Missing data were handled using the Multiple Imputation functionality of SPSS v. 24. Specifically, five sets of imputed data were generated. One of the five plausible values on mathematics achievement was assigned to each set of imputed data as the outcome measure.
Multilevel analysis
Multilevel analysis is required to study the relation between instruction (a classlevel variable) and mathematics achievement (an individuallevel variable). Several multilevel analytic approaches are available. As the most transparent way to explore the independent effects of several instruction items, we settled on hierarchical linear modeling. This is a generalization of linear regression to multiple levels, which has been extensively used in educational research (O’Connell and McCoach 2008), including studies of TIMSS data (e.g., Webster and Fisher 2000). Following the notation of Ma et al. (2008), we have the following studentlevel model:
Here Y_{ij} denotes the mathematics achievement for student i in class j, β_{0j} is the intercept in class j, γ_{10} measures the relation between mathematics achievement and the student’s socioeconomic status, γ_{20} measures the relation between mathematics achievement and the student’s gender, and r_{ij} is a random error term assumed to have a normal distribution with a mean of zero and constant variance. The studentlevel variables are assumed to have fixed effects across classes, but the intercept is assumed to vary at the class level according to the following classlevel model:
Here γ_{00} is the classlevel intercept, γ_{01} measures the relation between classlevel achievement and classlevel socioeconomic status, coefficients γ_{02}, γ_{03}, and γ_{04} measure the relations between classlevel achievement and our three focal instruction variables, and u_{0j} is a random error term representing a unique effect associated with class j. (In the analysis of TIMSS 2003 data, the ClassMemo term was excluded from the model. In the analysis of Swedish TIMSS 2015, additional terms for TestGr6 and ClassTestGr6 were included in the model.)
In addition to this twolevel model, we also analyzed a threelevel model that included an additional random error term representing a unique effect at the schoollevel. The difference in results between the two models was negligible. For this reason, we report only the analyses of the twolevel model.
Analyses were conducted using restricted maximum likelihood (REML) estimation in the linear mixed model function of SPSS v. 24. Using the SPSS functionality for analysis of multiply imputed data, analyses were performed on each set of imputed data and then pooled to yield unbiased estimates of effects and standard errors.
Results
Descriptive statistics and correlations in the Swedish data from TIMSS 2007–2015
For every wave of the Swedish data, Table 1 reports the gender distribution and the mean and standard deviation for the studentlevel measures. The SES measure (based on books at home) has dropped substantially from 2003 to 2015, perhaps driven by a shift to reading on screens. It is noteworthy that mathematics achievement nonetheless reached its highest mean value in 2015.
Table 2 reports the mean values and standard deviations of the classlevel instruction variables. Note that the mean values of ClassListen and ClassMemo have both gone up by more than a whole standard deviation from 2007 to 2015, indicating that mathematics instruction in Sweden (in the eighth grade) has been changing toward more frequent lecturing and memorizing during this period. For ClassDaily the trend is less clear.
The classlevel instruction variables were strongly positively correlated with each other, and correlations were consistent across waves, see Table 3. An implication of these positive intercorrelations is that a scale formed by the three instruction variables would have internal consistency at a level comparable to the Instruction to Engage Students in Learning Scale (Cronbach’s alpha > .6). We return to this point in the discussion.
Analysis of Swedish data from TIMSS 2003–2015
Table 4 reports estimates of fixed effects from multilevel analyses of mathematics achievement in each wave of the Swedish data. First note the strong positive effect of the students’ scores on the national test in grade 6, which were only available for the 2015 analysis. The strength of this predictor is in evidence from the proportion of variance at the studentlevel explained in the model increasing to 46% in 2015 from 8% in the previous three waves where this predictor was not included.
Second note that both SES and ClassSES had substantial positive effects on achievement, replicating previous findings of the importance of socioeconomic status and peer effects (Vandenberghe 2002).
Our focus here is on the independent effects of the three classlevel instruction variables. The estimates of these effects showed a consistent pattern. Both ClassListen and ClassMemo had consistently positive estimated effects on achievement, whereas ClassDaily had a consistently negative estimated effect. The 2015 analysis is of particular interest as it controls for students’ results on the national test 2 years earlier, thereby providing some evidence of causal effects of instruction on mathematical achievement. As can be seen in the 2015 column of Table 4, the evidence is strongest for the effect of ClassMemo and weakest for ClassListen.
Unfortunately, the method of including pretest scores as a covariate, as we did in the 2015 analysis, may lead to effects being overestimated due to regression to the mean (Eriksson and Häggström 2014). To address such concerns we also conducted an alternative analysis of the 2015 data using difference scores instead (CastroSchilo and Grimm 2018). Importantly, this alternative approach may instead underestimate effects of instruction due to not accounting for ceiling and floor effects (Eriksson and Häggström 2014). To make TIMSS scores and national test scores comparable we transformed both to zscores (i.e., rescaled to have mean zero and unit standard deviation) before calculating the difference score. We then performed multilevel analysis (without additional controls for grade 6 achievement) on this difference score, which represents students’ change in relative math achievement from grade 6 to grade 8. In this analysis the estimated effect of ClassMemo remained positive and statistically significant, such that a unit increase in this variable was associated with an improvement in relative math achievement of 0.27 ± 0.12 standard deviations, p = .022. However, the estimated effects of ClassListen and ClassDaily came out as nonsignificant (− 0.08 ± 0.14 and − 0.08 ± 0.10, respectively, p > .400). In conclusion, a consistent positive effect of ClassMemo on achievement was found across our analyses of Swedish TIMSS data. For ClassDaily the estimated associations with achievement were consistently negative but whether the association was statistically significant or not depended on exactly how pretest scores were taken into account in the analysis.
Analysis of data from each country in TIMSS 2003 and 2007
The same multilevel analyses as for Swedish TIMSS 2003 and 2007 were performed separately on the data from each of the 45 countries in TIMSS 2003 and each of the 50 countries in TIMSS 2007. For each country this yielded a set of coefficients estimating fixed effects. Median and mean effects across countries are reported in Table 5; results for each country are reported in Online Resource 1. Qualitative results showed consistency across waves as well as consistency with our findings in Sweden. Of greatest interest is the 2007 analysis, which included all three instruction measures. Note that the strongest estimated effects on achievement were the positive effect of ClassMemo followed by the negative effect of ClassDaily.
Comparisons between countries in TIMSS 2003 and 2007
Within each wave there was considerable variation between countries in the estimated effects. To draw valid conclusions from these results, it is crucial to understand whether this variation between countries is due to random noise or whether it reflects genuine differences between countries in the effect of instruction practices on math achievement. We therefore examined whether differences in estimated effects between countries were consistent across TIMSS waves. For this analysis we used data on 36 countries that participated in both 2003 and 2007. As illustrated in Fig. 1, there were highly consistent country differences across waves with respect to mean levels of reported use of instructional practices, both for ClassListen, r = .70, p < .001, and ClassDaily, r = .91, p < .001. However, with respect to the estimated effects on math achievement of reported use of instructional practices, country differences were not consistent across waves; the Spearman correlation between the estimated effects in 2003 and 2007 was virtually zero for ClassListen, ρ = .05, p = .78, as well as for ClassDaily, ρ = .06, p = .74. See Fig. 2.
Discussion
The purpose of this study was to investigate whether TIMSS data could shed light on the three debated instructional practices of lecturing, relating mathematics to students’ daily lives, and memorizing formulas and procedures. Our method was to examine the association between student achievement and studentreported measures of instructional practices in four waves (2003, 2007, 2011, and 2015) of the Swedish version of TIMSS and two waves (2003 and 2007) of the international version of TIMSS. Although our study was motivated by the question of the effectiveness of different instructional practices, it is important to note that observing associations between achievement and instruction does not necessarily answer that question. For instance, consider the observed negative association between student achievement and the practice of relating mathematics to students’ daily lives. This negative association could reflect that student achievement and relating math to students’ daily lives are driven in opposite directions by a third variable (e.g., if more effective teachers typically spend less time on everyday aspects of mathematics but some other factor accounts for the effectiveness of their teaching). Alternatively, the association could reflect a causal connection from achievement to instruction (e.g., if teachers instructing a lowachieving student group feel more obliged to stress connections to students’ everyday lives).
Crosssectional data alone cannot tell us which interpretation of observed associations is the most valid one. In educational research, the most common way to address this concern is to use additional data on achievement prior to instruction. Unfortunately, linking TIMSS data to such additional data is generally not possible, as TIMSS data are anonymized. In this study we benefited from Swedish TIMSS 2015 being a special case in which the TIMSS data were linked to certain available data on the participating students’ achievement in school before the dataset was anonymized.
Associations between instructional practices and math achievement
The best data we had were from Sweden, where (with one exception) the same three items had been included in each of the last four waves of TIMSS. Results were consistent across waves: students tended to score better on the TIMSS mathematics achievement test when attending a classroom where students reported that they memorize formulas and listen to the teacher more often, and that the mathematics is connected to their daily lives less often.
Our analysis of the international TIMSS data showed that the findings in Sweden were typical. Both in 2003 and 2007, the median effect on math achievement of each instructional practice had the same direction as we found in Sweden. There was considerable variation in results between countries. However, this betweencountry variation showed no consistency across waves; if an effect went in the atypical direction in one wave in some country, that effect would most often go in the typical direction in the other wave in the same country. This finding suggests that the betweencountry variation in results were mostly due to noise rather than any genuine differences in effects between countries. Thus, our tentative interpretation is that the typical associations between math achievement and instructional practices we obtained hold in countries in general.
In the introduction we described three longstanding debates on the role of teachers in instruction, the value of relating mathematics to students’ everyday lives, and the benefits of memorizing formulas and procedures. We argued that all three debates could be regarded as a reform movement position standing against a cognitive science position. In our study we found that better achievement was associated with more teacherled instruction, less connection to students’ daily lives, and—in particular—more memorizing of formulas and procedure. These associations are consistent with the cognitive science positions in all these debates. However, due to the possibility of alternative explanations (third variables and reverse causality), we cannot draw any firm conclusions from these associations alone.
Of particular interest, then, are our findings in the Swedish TIMSS 2015 dataset; as it included data on students’ scores on the national test 2 years earlier, this dataset allowed analyses of change in relative achievement over time. These analyses indicated that improvement in relative achievement was associated with students having been subjected to more memorizing of formulas and procedures.
How TIMSS could become more informative for evaluating instructional practices
We shall now discuss several possibilities of improving the usefulness of TIMSS as a tool to evaluate instructional practices.
First, it would be valuable to strengthen the design of TIMSS so that the same students are tested more than once, for instance, by including in the grade 8 study a subsample of the students who participated in the grade 4 study 4 years earlier. Data from such panel studies would be much more informative with regards to the causal effects of instruction. (Obviously, more countries could also follow Sweden’s example in linking TIMSS data to national test scores.)
Second, measures of instructional practices should be included in the international student questionnaire. The measures we have examined here have not been included in the international sample since 2007. As we have shown, measures of instructional practices enable examination of relations to student achievement. Moreover, as the Swedish data indicated, including such measures in every wave allows changes in math instruction to be tracked over time.
Third, the measures of instructional practices should be more refined. The items we have used seem to be underspecified. For instance, the effectiveness of listening to the teacher lecturing is very likely to depend on the content and coherence of the lecture. A more sophisticated example is provided by the item on relating to students’ daily lives. The theoretical rationale for Blömeke et al. (2016) to include a similar item (in the teacher questionnaire) in their measure of instructional quality was that it reflected cognitive activation, which has been demonstrated to be an important aspect of instructional quality. For instance, the COACTIV project reported by Baumert et al. (2010) found a strong correlation between cognitive activation and student achievement. However, the relating of mathematics to students’ daily lives is covered by the COACTIV framework only to the extent that it amounts to mathematical modeling, for which several subcategories are used to assess the difficulty of the modeling (Jordan et al. 2006). In sum, relating mathematics to daily life may or may not reflect cognitive activation; and to assess whether it does, it seems necessary to refine the question so that it specifically taps into the cognitive activation aspect. We believe this holds in general: Assessing the actual quality of various instructional activities requires more refined items than what has been included in TIMSS questionnaires so far.
Fourth, TIMSS should not provide scales of instructional quality for which there is no evidence that each item represents quality teaching. In the introduction we mentioned the Instruction to Engage Students in Learning Scale, provided by TIMSS, which Blömeke et al. (2016) used as a measure of instructional quality. This scale includes an item on relating mathematics to students’ daily lives, a practice for which we did not find any positive association with student learning. On this theme, we want to return to a point made in passing in the results section: the three items that we studied exhibited substantial intercorrelation. In other words, classes who reported that they often listened to the teacher and often memorized formulas and procedures also tended to report that they often connected math to their everyday lives. Indeed, the three items together had a level of internal consistency comparable to the Instruction to Engage Students in Learning Scale. Nonetheless, achievement was positively associated with two items and negatively associated with the third one. A plausible interpretation is that the three items have something in common (in the sense that responses to these items covary), but what they have in common does not represent instructional quality.
Conclusions
The idea of using international assessments to evaluate, understand and improve school systems dates back half a century. Still, they seem to be underutilized to inform the development of effective instructional practices. Here we used data from TIMSS to establish several interesting findings: Student questionnaires seem to give useful information on the use of various instructional practices in the math classroom. In contrast to the scale that TIMSS provides from the teacher questionnaire, the data on instructional practices from the student questionnaire yielded meaningful associations with math achievement within countries. These withincountry associations seem to hold in general, both across countries and across time. Moreover, variation between countries in levels of use of various instructional practices tended to be consistent across waves, indicating that these measures reflect genuine differences in how math is taught in different countries. At the same time, data from four consecutive waves of TIMSS in Sweden showed some clear trends, suggesting that these measures can be used to track changes in a country’s teaching culture over time. We have also suggested several possible improvements that could make international assessments like TIMSS an even better tool for studying the use and effects of instructional practices.
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Acknowledgements
The authors are grateful to Maria Axelsson at the Swedish National Agency for Education for providing us with the data on items that were specific to the 2011 and 2015 Swedish versions of TIMSS.
Funding
This work was supported by the Swedish Research Council [Grant Number 2014–2008].
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Eriksson, K., Helenius, O. & Ryve, A. Using TIMSS items to evaluate the effectiveness of different instructional practices. Instr Sci 47, 1–18 (2019). https://doi.org/10.1007/s1125101894731
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DOI: https://doi.org/10.1007/s1125101894731
Keywords
 Instructional quality
 TIMSS
 Mathematics achievement
 Student questionnaires