Check the Clues E - Puzzle Challenges (Swan & Dunstan)80 pages in full colour. Activities are free to be photocopied for your class. The Check the Clues E by Dr Paul Swan and David Dunstan offers schools a whole school approach to word problem solving using a co operative group approach. The books have been designed to improve the students' comprehension of mathematics word problems, and to build mathematical understanding through problem solving and reasoning. The Check the Clues series uses Polya's