Parallel geometry tasks with four levels of complexity involve students in writing and understanding proof.
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Improving Student Reasoning in Geometry
Bobson Wong and Larisa Bukalov
Connecting Research to Teaching: Keys to Successful Group Work: Culture, Structure, Nurture
Kasi C. Allen
Collaboration in the mathematics classroom contributes to student learning as well as strengthened preparation for twenty-first-century professions. However, facilitating group work with teenage students can prove challenging. Three strategies for success are establishing a supportive classroom culture; structuring groups and tasks; and nurturing the effort.