Pattern blocks are useful for teaching patterns, shapes, and colors. I purchased my blocks from Learning Resources because their blocks come in bulk and you can purchase wood or plastic. Then I created my own patterns for the students to follow. Below are pictures that I took using the blocks. These can either be printed out at actual size so that the student can place the blocks directly on the picture for one to one correspondence or printed smaller so that the student looks at the picture and creates a copy. My pictures are laminated to ensure longer use. This is also something that can be done with a group or independently like in a TEACCH system.