The Numicon 0-31 Number Line shows the numerals 0-31 spaced so that children can place a counter on each numeral in independent counting activities, helping them to generalize that the last number in their count tells them 'how many'. Set of 3.
Numicon has become part of what I do when teaching maths. It has become an integral part of maths lessons because it works! However did we teach maths before Numicon?