Tangrams are a great manipulative to use when teaching fractions or geometry! I introduce the tangrams by reading Grandfather Tang's Story by Ann Tompert. Then, I have the students try some of the puzzles and create a puzzle of their own or try to put the tiles back into a square. After a day of play, you can then use the tangrams to teach fractional parts or basic geometric shapes. You can even extend the lesson by giving the smallest triangle a value of $1 and have the students discover the value of the entire set of seven using the idea of fractional parts. This activity comes with 4 tangram puzzles to solve: the water can, a squirt gun, a candle and a house. Don't forget to challenge your students to solve all the other puzzles given in the story!
A great cross-curricular activity!