These cards can be used in several different ways to sort and learn about the different types of four-sided geometric shapes. Print a set onto card stock and you have a matching game, which can also be used for memory. For introducing these shapes and their names to students, print out two copies of the first page for recognition. Students may also color the shapes on each page that are alike when the activity is printed onto plain paper. The names of each can then be cut and pasted onto the back of the colored cards.