Number puzzles spatial/visual puzzles cryptograms Sudoku Kokuro logic puzzles & word games like Frame Games are all a great way to teach math & problem-solving skills to elementary & middle school students. In these two new collections puzzle master Terry Stickels provides puzzles & brain games that range from simple to challenging & are organized by grade level & National Council of Teachers of Mathematics (NCTM) content areas. Each book offers over 300 brain games that will help students learn core math concepts & develop critical thinking skills. The books include a wide range of puzzle types & cover a variety of math topics from fractions & geometry to probability & algebra.