Abstract
This paper focuses on the mathematical sensemaking by women of color in the USA as part of the global effort of dismantling deficit narratives about historically marginalized groups of students. Following Adiredja’s anti-deficit framework for sensemaking, this cognitive study invited a group of women of color to share their understanding of basis from linear algebra to construct a sensemaking counter-story. Extending the framework, this study examines a task that explores the boundaries and nuances of a concept to support the effort of going beyond students’ deficits. Eight women extended the concept of basis (and vector spaces) to 22 distinct everyday contexts, drawing from their everyday lives as well as topics from their academic experiences. Their explanations revealed analytical codes describing roles and characteristics of a basis. These codes suggest ways that students can mobilize the concept of basis beyond its logical underpinnings. Contrasting interpretations using a deficit and an anti-deficit perspective construct a counter-story that showcases these women’s creativity and flexibility in understanding the concept, and potential resources for the teaching and learning of linear algebra.
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Notes
In the USA, women of color include Black and African American women, Latinx, Asian American, Pacific Islander women, and Indigenous women. We consider them together as a group to recognize their shared underrepresentation in STEM higher education and careers.
All names are pseudonyms.
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Appendix
Appendix
1.1 Basis interview protocol
Q1. (a) What does a basis mean to you?
Follow-up:
(i) [If students felt like their course did not cover basis formally]: Some students have said that a basis of a vector space is a linear independent set that spans the vector space. What do you think that student means by that? Then go to (iii).
(ii) [If they only mention one but not the other]: Some students have said that a basis of a vector space is a linear independent set that spans the vector space. What do you think that student means by that? Then go to (iii).
(iii) [If they mention both span or linear independence]: What does each of those things mean to you?
Q1. (b) How would you explain it to a student who is about to take a Linear Algebra course?
Q2. (a) Can you think of an example from your everyday life that describes the idea of a basis?
(b) How does your example reflect your meaning of basis? What does it capture and what does it not?
Q3. Could basis be relevant for any of the tasks you did? If so, how?
Q4. Can you see a basis as a way to describe something? If so, what is the something? How?
Q5. Can you see basis as a way to generate something? If so, what is the something? How?
Q6. Go through each task, and ask if they CAN possibly see basis in them.
Follow up: Can you express #3 in parametric form?
[If time permits] Q7. (a) Some students say that a basis is a minimal spanning set, what do you think the student means by that?
(b) Some students say that a basis is a maximal linear independent set, what do you think the student means by that?
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Adiredja, A.P., Zandieh, M. The lived experience of linear algebra: a counter-story about women of color in mathematics. Educ Stud Math 104, 239–260 (2020). https://doi.org/10.1007/s10649-020-09954-3
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DOI: https://doi.org/10.1007/s10649-020-09954-3