Optimization: old dogs and new tasks. (English)
Math. Teach. (Reston) 105, No. 9, 686-691 (2012).
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In a class with Klein: generating a model of the hyperbolic plane. (English)
PRIMUS, Probl. Resour. Issues Math. Undergrad. Stud. 22, No. 2, 85-96 (2012).
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Mapping mathematics in classroom discourse. (English)
J. Res. Math. Educ. 42, No. 5, 451-485 (2011).
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