One of the main benefits of tangrams is theability to manipulate
  the pieces; to "play" with the shapes and get a feel for the
  challenge. For this reason, it would be a good idea to encourage
  pupils to print off and cut out the shapes for themselves. Not
  only will children be using their knowledge of properties of
  squares as they try this activity, but they will also be putting
  into practice their visualising skills. Tangrams can be great to
  work on in pairs and this will encourage the pupils to talk
  together about what they are doing - a great opportunity for you
  to listen!<br />