This unit is a great starter unit for the science curriculum. I used this in 6th grade, however, it would be great for any grades 4-9th. I reviews the major topics of the scientific method, independent and dependent variables, pseudoscience, science, theory, and law. This is a bundle of some of my STEM labs that are nicely arranged to create a unit. This unit is about 2-3 weeks long at a 50 minute class period each day. This unit is amazing, because it incorporates technology, STEM, NGSS al