Kids have a lot of misconceptions about capacity, and they can really only be cleared up through hands-on exploration. Sadly, I don't think they get opportunities for this like we did when we were kids. Instead of playing in a sand box or with cups and bowls in the bathtub, kids are playing with iPads and Wii's. And so many districts (mine included) are taking away sand and water tables from kindergarten, in favor of more "rigor." Because of this, kids are not building the schema necessary to understand more abstract concepts about capacity. So please, please give your kids lots of time to explore by filling up cups with water, sand, rice, beans, cubes...whatever you have! If you are lucky enough to still have a sand or water table, it is the perfect excuse to use it. Don't let anyone tell you it's not "rigorous"! Day 1 I start my unit by showing a quick little powerpoint, to get a discussion started. You can download the PPT by clicking the link below: Download Will an Elephant fit in a Bathtub The kids are able to quickly give the correct answers. But I push them--I want to know why! (Because...