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Activity
The Math Forum: Beat the Calculator! Activity
National Council of Teachers of Mathematics

The Math Forum: Beat the Calculator!

For Students 3rd - 8th
Find more than 500 "mental calculation tricks" that will help you square numbers, add, multiply divide, subtract, and find percentages. A great resource for advance math students, gifted children, and teachers wanting to find ideas for...
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Activity
Braingle: Probability Brain Teasers Activity
Braingle

Braingle: Probability Brain Teasers

For Students 9th - 10th
Check out the variety of probability brain teasers at this site, which you can sort by popularity and difficulty.
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Activity
Braingle: Math Brain Teasers Activity
Braingle

Braingle: Math Brain Teasers

For Students 9th - 10th
Check out the variety of math brain teasers at this site, which you can sort by popularity and difficulty.
Get Free Access See Review