This is a SMART Notebook file. It supplements the NYS EngageNY lesson 14 for Module 4 (Find areas by decomposing into rectangles or completing composite figures to form rectangles.)
This set of lesson slides are based on the materials available free of charge from New York State's engageny website at http://www.engageny.org/resource/grade-3-mathematics.
The slides are meant as a companion to the lesson module script and are meant to save other teachers having to make slides. I make no claim to the material content and believe my production of slides is fair use and non-infringing.