A+ Click
A+ Click helps students become problem solvers. No fees, no ads, no calculators, and no sign in. The website features a graduated set of 10,000+ challenging problems for students in grades one through twelve, starting from the very simple to the extremely difficult. The questions concentrate on understanding, spatial reasoning, usefulness, and problem solving rather than math rules and theorems. The problems include a short description and an illustration to help problem solvers visualize the model.