1. Establish a solid foundation: Calculus is based on basic knowledge such as algebra, geometry and trigonometry. Make sure you have mastered these basics, including functions, equations, graphs, etc.

2. Understanding concepts: Calculus involves some abstract concepts, such as limit, derivative and integral. Take time to understand the definition and nature of these concepts. You can deepen your understanding by reading textbooks, participating in class discussions or watching related videos.

3. Do more exercises: Calculus is a subject that needs a lot of practice. Doing a lot of exercises can help you get familiar with various problems and improve your problem-solving ability. You can start with simple topics and gradually increase the difficulty.

4. Ask for help: If you encounter difficulties in your study, don't hesitate to ask for help. You can ask questions from teachers, attend remedial classes or find online resources. Discussing problems with others can also help you better understand and solve problems.

5. Make a study plan: Make a reasonable study plan and allocate the study time to different topics and chapters. Make sure you have enough time to review and consolidate what you have learned.

6. Do more practical problems: Calculus has many applications in real life, such as physics and economics. Try to solve some practical problems and apply theoretical knowledge to practical situations, so that we can better understand and remember what we have learned.

7. Persistence and review: It takes time and patience to learn calculus. Insist on learning a little every day, review what you have learned regularly, and keep your mastery and memory of knowledge.

In a word, learning calculus well in senior high school needs to establish a solid foundation, understand concepts, do more exercises, ask for help, make study plans, do more applied problems, and persist in and review. Through continuous efforts and practice, you will be able to master the core concepts and problem-solving skills of calculus.