Telling time is not enough. Students need to understand and apply strategies to solve elapsed time situations that are real world. This knowledge is essential in creating a deep understanding of using clocks as a tool to measure the passing of time.
Students need to practice deconstructing arrays with manipulatives in order to conceptualize the distributive property. This 3 day lesson takes the children through increasingly sophisticated activities to explore the "why" and "how" of this property.