2. For important historical events, we should understand the background, causes, process, content and influence. If you don't know this, just ask the teacher directly. Don't be embarrassed. In addition, listen carefully in class and take more notes. What the teacher said in class is much better than the theory in the book!
Just ask a few more questions. Don't be embarrassed. At first, you may not be able to think of any meaningful questions. Just ask unofficial history and the teacher. Slowly, the more you think, the more you ask.
Not only set up a good image for the teacher, but also improved his grades!
4. Directly speaking, the most effective way is to ask sea tactics. If possible, it would be much better to buy some teaching AIDS!
I'm talking about my personal opinion. At least how did I learn it? I changed from bad to good. I hope it helps you. Good luck!