Here’s a quick free math video about how to teach division using Cuisenaire Rods. Division is no problem at all if children are used to doing multiplication with the rods because the “picture” is exactly the same.
In this video I only talk about the interpretation of division being a whole amount divided into groups of a certain amount. You can also teach the other meaning of division – a whole being divided into a certain number of groups. For that, you would ask the child something like (for 24÷3) “Which rod will go evenly into 24 three times?” and the child would find that he can fit the 8-rod under 24 three times.
Cuisenaire Rods are a wonderful manipulative, useful for everything from addition all the way to fraction/decimals/percents and even beyond (with a few cosmetic changes to the rods).