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Dan Christensen

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4 Questions

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Are students being adversely affected by cranks or trolls in online math forums?

secondary-education

Dec 5 '17 at 17:13 Nate Bade 1,863

2

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268

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Might it be helpful for students to have different symbols for subtraction (-) and negation ( _ )?

secondary-education algebra middle-school

Dec 13 '17 at 13:36 Dan Christensen 703

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US High School Geometry: What are all the “reasons” allowed in two column proofs?

geometry

Dec 11 at 18:40 Matthew Daly 4,277

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Comments on my approach to Group Theory notes?

undergraduate-education abstract-algebra

Apr 9 '16 at 6:37 Jessica B 5,390

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