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Joseph O'Rourke's user avatar
Joseph O'Rourke's user avatar
Joseph O'Rourke's user avatar
Joseph O'Rourke
  • Member for 10 years, 1 month
  • Last seen more than a week ago
4 votes
0 answers
131 views

When can students understand the intersection of two circles?

8 votes
10 answers
2k views

How to explain (FALSE => TRUE) is TRUE [duplicate]

40 votes
13 answers
5k views

Beautiful planar geometry theorems not encountered in high school

23 votes
2 answers
2k views

Can we avoid confusion over using "let" as a quantifier?

3 votes
0 answers
116 views

Books with Glossaries

6 votes
2 answers
365 views

Demarcated "Proof Idea"

46 votes
18 answers
12k views

How to explain the flipping of division by a fraction?

87 votes
21 answers
26k views

Why are induction proofs so challenging for students?

3 votes
1 answer
494 views

Calculus via a constructivist approach

11 votes
11 answers
4k views

Ideas for explaining 4D and higher dimensions

12 votes
8 answers
846 views

How best to explain the logarithm to the mathematically naive?

4 votes
2 answers
1k views

Is the Wronskian still assumed for graduate education?

17 votes
6 answers
11k views

Explanation for cutting a Möbius strip at one-third its width

15 votes
6 answers
2k views

Iconic image to explain the fundamental theorem of calculus?

35 votes
15 answers
9k views

Justifications for: Why learn mathematics?

17 votes
11 answers
2k views

Natural occurrences of a to the (b to the c)?

25 votes
1 answer
767 views

Is there a Piagetian age at which proofs can be comprehended?

1 vote
3 answers
689 views

When are students taught implicit and parametric representations of curves?

3 votes
4 answers
876 views

What is an algebraic explanation of why the product of the slopes of perpendicular lines is $-1$? [duplicate]

4 votes
2 answers
620 views

Advice: How to cite literature for high-school students?

4 votes
1 answer
493 views

Cinderella vs. GeoGebra

10 votes
1 answer
280 views

College undergraduate geometry courses

7 votes
1 answer
240 views

Solving open problems through a misunderstanding

6 votes
0 answers
218 views

Tablet whiteboard app w e-pencil

21 votes
3 answers
5k views

Pedagogical challenge: Homeomorphic vs. Homotopy equivalent vs. Homologous?

9 votes
2 answers
405 views

Fear of 3-dimensions

20 votes
4 answers
3k views

Does anyone teach logarithms via slide rules?

6 votes
3 answers
382 views

Cardinal vs. ordinal: When learned? When needed?

18 votes
5 answers
14k views

What is the most difficult concept to grasp in Calculus 1?

4 votes
1 answer
342 views

The most transparent exposition of Bayes' Theorem