Stage: 2 Challenge Level: 
Our Advent Calendar has a new World of Tan tangram for each day during the build-up to Christmas. Simply click on the dates to follow the story and complete the challenges.
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Visualising. Generalising. Games. Compound transformations. Tangram. Practical Activity. Investigations. Working systematically. Addition & subtraction. Interactivities.
Published December 2006.
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