You NEED to pay attention in class, and you will be completely fine without much outside studying. Many of the questions on his tests are based on things he talks about in class. He also hands out very useful review sheets for each test, so you don't have to worry about not knowing what to study. Make sure you are in class on lab days, you do not want to miss those because he gives out a lot of important information.

Rewatch the videos in the slideshows, there will be a few odd questions on them and read the wording carefully as many of the questions in Living Environment are regents questions and often design to be tricky. the POWERPOINTS ARE NOT ENOUGH you need to take additional votes if you'd like to study with them