This activity really helps to emphasize that a square is both a rectangle, a rhombus, and a parallelogram.
Students are given tangrams (alone or in partners) and asked to find as many as possible. They have to use the exact number of pieces in a row to make the shape from the column. Have them sketch the shape in the corresponding boxes. With the tangrams that I use, some are not possible, but I don't tell them which ones. I give the team that finishes the fastest a prize.
If you do not have your own tangrams, you can find a set online to print. I suggest one that is already a 7 piece square.
**Sometimes I change out kite for triangle depending on which tangrams I am using.