just focus on taking notes and don't fall behind. ask him questions and try to practice essays to better understand the proper way of writing for an AP history class

pay attention and take notes the whole way through buy a prep book keep your notes

If you have gotten Iglesias for your AP Euro or California History class, congratulations, you have been blessed. He is the most kind-hearted and empathetic teacher that I have possibly ever had, period. His class is very chill and enjoyable, and having his class first period always made it easier for me to get through each day. Don't cheat in his class though; you will get caught and, even if he does not particularly want to do it himself, be punished. It's pointless anyways, and here's why. The notes he assigns and the concepts he goes over in class all directly relate to what will be on the test. Take good notes and study them before each test. If you do this, you will succeed in the class. He curves every test he gives anyways, so it doesn't matter if you don't know the answers to a few of the questions. The DBQ and LEQ writing assignments he assigns are fairly easy as well. As long as you focus on having a fairly strict structure in your essays and make sure that all of your points support the main claim, you should be fine.