Top network posts

• 21 Why do we introduce the notion that triangles are "congruent" instead of just saying that they are "the same" or "equal"?
• 20 What does research indicate about how one should treat units in elementary school?
• 17 Understanding the solution of a riddle about lions and sheep.
• 17 Common misconceptions in high school probability curriculum
• 16 Show that $x^4 + 8$ is irreducible over Z
• 13 Analyzing an answer to the following problem: Give meaning to $\frac{4}{5} + \frac{2}{3}$
• 13 What can (and should) an educator do about ambiguous terms like "triangle", "square", etc?
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