In this math lesson, learners explore the concept of using units to measure length. Learners first read "How Big is a Foot" by Rolf Myller and learn about units. Then, learners visit four measurement centers. In each center, learners will measure items with various kinds of units. Learners use non-standard units to measure their shoes, the distance between beanbags and a bull’s-eye target, their body parts (arms, legs, etc.), and some everyday objects. This lesson guide includes instructions on how to set up a "Shoe Store" dramatic play area that can be used to introduce learners to measurement prior to this activity.