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Otten, Samuel; Gilbertson, Nicholas J.; Males, Lorraine M.; Clark, D. Lee – Mathematical Thinking and Learning: An International Journal, 2014
International calls have been made for reasoning-and-proving to permeate school mathematics. It is important that efforts to heed this call are grounded in an understanding of the opportunities to reason-and-prove that already exist, especially in secondary-level geometry where reasoning-and-proving opportunities are prevalent but not thoroughly…
Descriptors: Abstract Reasoning, Textbook Research, Textbook Evaluation, Geometry