Elementary STEM teachers, this bundle has hundreds of activities (300+!) for your STEM classes! With a mix of quick STEM challenges, STEM center activities, and more in depth engineering design challenges, you will always have something new to do! This bundle includes everything in both the K-2 and 3-5 Ultimate STEM Bundles. These resource will keep your students actively engaged in STEM all year long. The bonus file includes an overview for using the resources as well as some extra options for