Activity 51: Tangrams
Teaching points: solve 20 preset puzzles or undertake investigations e.g. investigate the different polygons that can be made using the tangram pieces.
If you liked these activities, then you can access them and hundreds of others at www.theschoolhub.ie which is a site managed by a group of Irish primary teachers. They have created interactive whiteboard activities and gathered the links to the best of the rest out there on the web.