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. Each pack includes 55 magnets 3 demonstration circles 3 demonstration squares 4 connecting lines 45 discs and an activity guide. Magnetic discs measure 30mm D circles measure 200mm D and squares measure 240mm D.