Math, PreK, K, Grades 1-6, Number comparisons, Kindergarten, Homeschool, Google AppsFrom Wikipedia, the free encyclopedia:"Cuisenaire rods used to illustrate the factors of tenCuisenaire rods are mathematics learning aids for students that provide an interactive, hands-on[1] way to explore mathematics and learn mathematical concepts, such as the four basic arithmetical operations, working with fractions and finding divisors.[2][3] In the early 1950s, Caleb Gattegno popularised this set of colore