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2 votes
0 answers
213 views

When Did They Start Using Ohm's Triangle for Arithmetic Topics?

4 votes
1 answer
319 views

How can a church or other non-academic institution find and hire math teachers?

11 votes
5 answers
2k views

How to justify formula for area of triangle (or parallelogram)

6 votes
2 answers
421 views

Is there an equivalent for "tiervenner" in English or other languages?

0 votes
1 answer
58 views

Recommended math site or app for 7th/8th grade

32 votes
2 answers
5k views

Which product of single digits do children usually get wrong?

1 vote
4 answers
237 views

How to round numbers?

6 votes
6 answers
441 views

Why is $a+b = b+a$?

14 votes
18 answers
6k views

What are some "deep" questions to explore in elementary school math?

8 votes
3 answers
209 views

Pi Day Celebration Ideas?

31 votes
8 answers
8k views

What was the problem with New Math? Why did it end?

-2 votes
2 answers
212 views

Staircase method of small integer addition

2 votes
2 answers
167 views

International mathematical olympiad-type competitions at lower levels, and if they exist, their educational usefulness?

64 votes
17 answers
9k views

Is there a virtue to learning how to compute by hand?

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