A great collection of math puzzles and brainteasers for students in grades 3-5. Over 300 reproducible puzzles and brain games that teach math skills, problem solving and critical thinking--all organized into groups that correspond to concepts recommended for learning by the National Council for Teachers of Mathematics Standards, including: Numbers and Operations Geometry and Measurement Mathematical Reasoning Algebra, Statistics, and Probability Includes a wide range of popular puzzle types like sudoku, kokuru, and frame games as well as math, visual and logic puzzles, word problems and other brain-twisters.