Current Problems of the Week
Primary
A Walk to the Park
 October 20
Find the total number of blocks Tom walked. Preview: Dog Packs 
Algebra
Splash!
 October 27
Latest Solution: What's the Difference?
How many throws did it take each student to sink Mr. Rashanul in the dunking booth at the carnival? 
Math Fundamentals
Subway Subtotals
 October 27
Latest Solution: So Many Salmon
How did the people in my subway car pay their fare this morning? 

PreAlgebra
3D Vision
 October 20
Latest Solution: Integer Images
What shape is formed by the segments on the faces of the cube? Preview: Falling Leaves 
Trig & Calculus
Can You Prove It?
 October 27
Latest Solution: Up, Up, and Away (Part II)
How do you know that a number is irrational? Can segments with irrational length be constructed using only circles and lines? 