David & Lynda Olson Elementary School
A problems organized by concept and grade level. Each problem can be presented at many different levels depending on the students' needs.
The home of rich mathematics by the University of Cambridge
Tools to differentiate for higher level thinking.
Students act as math detectives to solve reasoning problems.
Each act provides a bit more information. Between acts students must think deeply to consider all of the possibilities before the solution is revealed in the 3rd act.