The Stile Tray is the key to the self-checking activities of the Key Stage 2 programme. Pupils answer the questions by simply placing each of the twelve numbered tiles on the appropriate square on the base of the tray. When all the tiles have been placed, they close the tray, turn it over, and reopen it to reveal a geometric pattern. If the answers are all correct, the pattern will match the one printed at the top of the exercise. There are many different accompanying workbooks for use with the Stile Tray, covering Literacy, Maths and Dyslexia.

This set of six books offers a clear and versatile approach to the teaching of the main understanding shape and measuring requirements of the PNS Framework for Mathematics, for Years 3 and 4 of Key Stage 2 (ages 7-9). The materials are also suitable for the practice and reinforcement of key skills with older children who are less able: year labels have been left off the books, and illustrations are appropriate for a wide age range. Each book contains 24 pages (150 x 266mm) A Stile Tray is required to use these books; they are sold separately.