Base 10, the numbering system in common use, can be shown in many formats. One early maths system thought in schools was with the abacus, which are still in use, we also have arrays, number boards, pocket charts and wooden and plastic base ten sets. With the advent of whiteboards, base ten sets are also available in a magnetic form for your classroom. For those teachers who need extra ideas there is also in stock a book “Developing Mathematics with Base Ten”. This is a colourful reference resource with a range of activities, master sheets and comprehensive background information designed to appeal to diverse range of student learning abilities.