During our unit over bacteria. We did a bacteria lab in class and swabbed 10 common items we touch or come in contact with everyday. Not everyone has the materials available to grow their own bacteria so you may use this power point to view petri dishes of grown bacteria. There are also questions at the end of the power point and after some slides to keep students engaged during the lesson. Use it to supplement or use it at the end of a lesson if you cant do the lab yourself!