This front-of-class slider perfectly demonstrates simply and clearly how numbers and the decimal point are affected by multiplying and dividing by 10 or 100. The five-square slider is composed of a dry-wipe surface for multiple demonstrations. Pack of 30 children-sized sliders is available separately for child interaction and working along with problem solving. Dimensions: Teacher slider 420 × 190mm. (Pupil sliders dimensions: 210 × 100mm).