"This website has arisen out of a learning network project that involved six Cambridgeshire Nursery Schools and Children's Centres in building on good practice in children's mathematical development. In particular we looked at the area of mark making for mathematical purposes and as a process towards informal forms of written calculations across the Early Years Foundation Stage."
"ATM speaks for creativity, thought, and the enjoyment of the struggle in calculation, reasoning and discovery"
Huge collection of resources for sale, includes software.