Having prospective teachers find the inscribed angle theorem for themselves can foster mathematical reasoning.
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Bobson Wong and Larisa Bukalov
Parallel geometry tasks with four levels of complexity involve students in writing and understanding proof.
Gloriana González and Anna F. DeJarnette
An open-ended problem about a circle illustrates how problem-based instruction can enable students to develop reasoning and sense-making skills.
Irina Lyublinskaya and Dan Funsch
Symbolic geometry software, such as Geometry Expressions, can guide students as they develop strategies for proofs.
Ellipses are the focus of photographs and mathematical equations.
Günhan Caglayan
Students analyze a photograph to solve mathematical questions related to the images captured in the photograph. This month, photographs of ancient arches lead to a discussion of inscribed polygons.
A cartoon exploring a problem about cutting up pizza is coupled with a full-page activity sheet.
A set of problems of many types
A set of problems of many types.
A set of problems of many types.
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