Battle of the Bacteria Video / Lesson Plan Explained: https://www.youtube.com/watch?v=OAXqaKTLoRcWhether you teach upper elementary or middle school, it can be difficult to fit all of the subjects in a given day. With this activity, it makes it simple to teach math, writing, reading, health, and of course science together with one experiment. (I have done this activity as a 5th grade and 7th grade teacher).In this activity, students go throughout the school and collect samples of places that t