Students in Grade Three need to master some methods and skills in self-study of senior high school mathematics. First of all, they can understand the basic concepts and knowledge points of high school mathematics by reading high school mathematics textbooks. In addition, they can also deepen their understanding of knowledge points by watching relevant teaching videos.

Secondly, students in Grade Three can do more exercises to consolidate their knowledge. They can start with simple topics and gradually increase the difficulty. In the process of doing problems, they should pay attention to summing up the laws and methods in order to better master the knowledge.

In addition, students in grade three can also take some online or offline math remedial classes to improve their math level. In these remedial classes, teachers will provide targeted counseling according to the actual situation of students to help students solve problems encountered in their studies.

Finally, students in Grade Three should cultivate good study habits and self-discipline awareness. They should arrange their time reasonably and insist on studying for a certain time every day. In the process of learning, they should stay focused and avoid distraction. At the same time, we should be brave enough to ask questions from teachers and classmates and make continuous progress.

In a word, junior three students need to master some methods and skills to learn high school mathematics by themselves, and they should study persistently. Only in this way can they get excellent grades in high school. I wish you progress in your study!