Can you build a scary monster out of shapes? Shape Monsters is a printable math center that will help your students practice creating composite shapes with 2D shapes! Use this center to supplement any standards- based, 1st grade math curriculum! First Grade Common Core Math Standard: 1.G.A.2 Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) orContinue reading “$1 Math Center Spotlight: Shape Monsters”