In fact, the third grade is still very important, and it is very important to get into a good high school. Make good use of this summer vacation and make a systematic review plan, especially English and math, but don't do too many exercises, which will never be finished. Familiarity with the concepts in the book is the most important. According to my past experience, the most mistakes in the exam are conceptual questions, which are most obvious in mathematics and physics. So when you review, you must thoroughly understand the concepts in the book. It's best to prepare a notebook and collect those error-prone topics and confusing concepts. That's all, I hope it will help you!