I love Mr. Anderson's podcast videos for topics in Science. He has great information with great examples and great visuals. I have created some guided notes pages to help my students pay attention, follow along (as I team teach with Mr. Anderson), and have notes to look back on when studying. These notes go with his youtube video on pH, Acids, and Bases. The video is just over 8 minutes and this is a front/back handout to accompany.