A Box of Cubes
How many 1 inch cubes can fit in a rectangular box that is 10 by 6 by
3 inches?

3rd to 5th

A Carpenters Trisection
Explain whether or not the given method of trisecting an angle, using
only a carpenter's square, really works.

Geometry

6th to 8th, High School

A Championship Season
The Algenauts just finished a great season, winning 40 more games than
they lost. Can you figure out what their final record was?

If a rectangular garden were 2 feet wider and 3 feet longer, it would
be 64 square feet larger. If it were 3 feet wider and 2 feet longer,
it would be 68 square feet larger. What are the dimensions of the
garden?

Geometry

6th to 8th, High School

A Great Way to Make Money
Is it better to rely on a weekly pay of $10, or take a chance on the
money that is in a paper bag?

Discrete Math

High School

A Happy New Year Wish
Explain how time differences are calculated and understood using longitude.

Pre-Algebra

6th to 8th

A Holiday Card
Find the ratio of the red area to the green area as the number of
squares approaches infinity.

Limited 10th Anniversary Edition now available!
Featuring a new cover design and foreword by author team, this collectible, Limited 10th Anniversary Edition of Principles to Actions celebrates 10 years of useful and actionable guidance to educators as we work to strengthen the teaching and learning of school mathematics for every student.