Ideal classroom demonstration tool. Over-sized magnets are perfect for getting the whole class involved in number bond activities. Whiteboard demonstration tools are ideal for whole class activities and magnetic resources can be used time and time again. Number bonds are ideal for practising a variety of maths concepts: addition and subtraction, inverse operations and number relationships. Set includes 55 magnets, 3 demonstration circles, 3 demonstration squares, 4 connecting lines, 45 discs and an activity guide. Magnetic discs measure 3cm D, circles measure 20cm D and squares measure 24cm D.