Completely designed to meet NGSS! Students will BUILD a model, USE a model, and DRAW their models to show their results! Download the preview to get the matching PowerPoint that can be used to introduce your lesson. It includes two YouTube videos to help set the stage. You will also be able to see each of the two challenges and a complete list of all the materials you will need. Now that you already have the PowerPoint, all you need to do is purchase the rest of the lesson and you'll be on your