It's a Perfect Fit (Parts 1 through 3)
Here is a three-part lesson on shapes. Each lesson is for a different grade level. Peruse them and pick what is appropriate for your pupils. Circles, squares, rectangles ... hexagons, trapezoids, pattern block patterns, and more are encompassed in this three-part series. There are some fun activities that challenge your pupils to really think out side the box. Ha Ha. Pun intended.