Friend of mine taught math and science and home ec. She also quilted and won awards. She took quilts in to help her kids with math and a couple students who were held back became so much better. The angles and fractions played a big part in their understanding and they actually passed with flying colors. She would pass around envelopes with cut pieces of paper and they would have to put it together to form a block. They also had to name the shape. She said every once in awhile, she would throw different kinds of triangle. They had to name the degrees of the angles.