Foster higher - order thinking skills with these magnetic graphic organizers and manipulatives. Great for whole - class demonstration or sorting and grouping activities in centers, circles adhere to all magnetic surfaces, including classroom white boards. Create a Venn diagram with circles and manipulatives. Or, use just the circles on a white board and write in text to teach comparing and contrasting in any subject. Set includes 1 each of red, blue and yellow circles and 108 shapes. Shapes come in 3 sizes and colors to match the circles. Shapes measure 1/2" - 1 1/3"L. Sorting circles measure 10" in diameter.