Are you looking for experiments that are fairly easy, with little cost, and quick but STEM based? Then this lesson is for you. It involves one of the easiest ingredients in winter - snow. The experiment examines how clean it is. The lesson plan is written using SIOP form. One way to do this experiment is in a science center but I like to have Fridays be our project days and my students write about every project we do. You can buy them as a package with this. I used this experiment to teach why w