How many book covers you buy in the seventh grade depends on how many books there are in the seventh grade. Generally, there will be Chinese, mathematics, English, physics, chemistry, morality and rule of law, history, geography, biology and other subjects in the seventh grade, and there may be 30 to 40 books in total. Generally, you can buy 30~40 book covers.

How to study in seventh grade;

1, after junior high school, the class capacity of each class is relatively large, and there are more knowledge points in each class in junior high school, so teachers should listen carefully in class, make full use of every minute of class, and strive to be distracted for one minute.

2. After entering junior high school, don't be limited to the basic homework assigned by the teacher, but also review what the teacher said that day, read the notes carefully, prepare for the next day's study, preview the next day's study content in advance, and understand the knowledge taught by the teacher more comprehensively and thoroughly.

3. Take notes carefully according to the teacher's requirements in class, and the content of the teacher's blackboard is mostly the most important. What other teachers don't write but emphasize repeatedly should also be recorded in the notebook. Secondly, pay attention to the speed of taking notes. We can't delay the next focus because of one focus. We can simply write it down in a way that we can understand, and then add it after class.

4. Recycle and recite the commonly used atomic mass table, elemental valence table, acid-base salt dissolution table, and strictly avoid losing points due to forgetting in the senior high school entrance examination. Memorize and summarize the chemical equations given by the teacher carefully, require flexible learning, and disclose the reaction conditions and results.

5. Remember that physical formulas, material constants, electricity and optics are the weakest links in my physics. I will carefully consolidate my knowledge of electricity and optics according to the teacher's general review. Review all the knowledge carefully according to the syllabus, finish your homework on time and take notes.