Did you know that math can be fun? Not only can you use your math class to teach geometry and critical thinking, but your students can have fun along the way too! This resource includes a worksheet with a brain teaser featuring many squares inside of more squares. How many squares can you see? See the solution to find out! The resource is a powerpoint file formatted so the worksheet will print on regular (8.5x11in) paper. The powerpoint is completely animated and walks your students through all of the squares in the teaser following a methodical step-by-step solution. You can use this resource for arithmetic and geometry. You can use it to teach team work and cooperation by having students work on it in teams. You can edit the worksheet if you want to add additional instructions (for example, "for extra credit, how much area would all of the squares take up if the largest square is 4x4 inches?"). The preview file is fully animated to give you a feel for the resource. The preview includes the first few slides only. Related products: How Many Triangles? NOTE: The preview goes up to 19 but the full resource reveals all 40 squares.