Hi! I taught middle school science for eleven years. PowerPoints were a wonderful tool for focusing students! I used this PowerPoint presentation as a review of the characteristics of rocks and minerals. I usually had students write the information from the slides as notes to study for their test over the unit, but it could also be used to introduce the characteristics. The picture in the background is really great to refer to as you are discussing the characteristics. This PowerPoint was produced for 6th and 7th grade science classes, but I imagine it would also work for 5th up to 9th, any class that needs basic review.