Abstract
This paper presents a study on discovery learning of scientific concepts with the support of computer simulation. In particular, the paper will focus on the effect of the levels of guidance on students with a low degree of experience in informatics and educational technology. The first stage of this study was to identify the common misconceptions about density, starting from a literature review. Forty eight students (25 M and 23 F) from two high schools in Vanuatu were then involved in the study. These students were divided into three groups according to the different levels of guidance they received (Unguided; Minimum guidance, Maximum guidance). A pre and post activity questionnaire was designed containing 12 questions. The students underwent a training session with computer simulation about density. Using a descriptive and an inferential statistics method, scores obtained from the three different groups were compared during pre-test and post-test analyses. From the analyses it was found that the construction of knowledge from discovery learning activities occurs with or without guidance, however the amount of guidance received has an influence on the depth of conceptual understanding.
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Appendices
Appendix A
1.1 Examples of questions take from the questionnaire based on the work of Çepni & Şahin, (2012)
1.1.1 Questions n.: 3
Sketch the representation of the three bottles of water when dropped in the water-aquarium.
Circle a letter of choice which gives a best explanation for your choice in question 3.1.
Choice | Possible explanation |
---|---|
A | Each bottle’s position in the water is determined by the amount of water in it. |
B | Each bottle’s position in the water is determined by its weight alone |
C | Each bottle’s position in the water is determined by the amount of air in the bottle |
D | Each bottle’s position in the water is determine by the density of liquid it contains |
1.1.2 Question n. 10
This aquarium is filled with oil. Sketch the representation of these wooden and metal balls when dropped into it.
Circle a letter of choice which gives a best explanation for your choice in question.
Choice | Possible explanation |
---|---|
A | Each ball’s position in the oil is similar to that of water |
B | Some part of both ball’s will be emerged on the surface of the oil |
C | Both ball’s will be at the bottom of the aquarium |
D | A larger part or larger fraction of the wooden ball will be emerged and the metal ball will maintain its position compared to that if it was in water |
E | Both ball’s hang in the oil with the wooden ball above the metal ball |
1.1.3 Question n. 12
In the pictures below, substances with the same volume are placed into the barrels filled with water. Which one of these substances will cause equal amounts of water from the barrels to over flow?
Circle a letter of choice which gives a best explanation for your choice in question 11.1.
Choice | Possible explanation |
---|---|
A | Because the mass of both objects are equal |
B | Because both of those two objects are heavier than water |
C | Because the amount of overflowing water of the submerged object is equal |
D | Because the displaced water is equal to the submerged volume of water |
E | Because both objects are under the water |
F | Because parts of both objects are above the water |
Appendix B
Task from the activity on density proposed in the training sessions (Retrieved online from http://phet.colorado.edu/sims/density-and-buoyancy/density_en.html the 17/12/2014):
Material | Mass (kg) | Volume (L) | Density (kg/L) | Does it Float? |
---|---|---|---|---|
Styrofoam | ||||
Wood | ||||
Ice | ||||
Brick | ||||
Aluminum |
In the custom setting, choose the ‘My block’ option in the material drop down box. Set the mass of your object to 4 kg. Adjust the volume to find the minimum volume needed to make the object float.
Volume_________________ Density__________________.
How does the density of a large piece of aluminium compare to a small piece?
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Moli, L., Delserieys, A.P., Impedovo, M.A. et al. Learning density in Vanuatu high school with computer simulation: Influence of different levels of guidance. Educ Inf Technol 22, 1947–1964 (2017). https://doi.org/10.1007/s10639-016-9527-4
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DOI: https://doi.org/10.1007/s10639-016-9527-4