Deeply understand mathematical definitions and theorems, and understand the equivalent forms of definitions and theorems.
In chemistry, memorizing more and memorizing more is the so-called "metaphysical way", abstractly summarizing chemical laws and looking for universal laws.
In physics, we must remember to use mathematical knowledge to enhance our understanding. For kinematics, we can combine derivatives to enhance our understanding.
Remember the definitions and theorems in biology and prove them yourself.
Summary: Science, as its name implies, is the foundation of learning. Laozi said, "To uphold the ancient way, to guard against the present, and to know the beginning of the ancient is called Dao Ji." When looking at a problem, we must grasp the main contradiction of things, practice more and sum up the truth. The so-called understanding of reason is the most fundamental. What is reading, practicing and taking notes? I don't want to say much, but learning and thinking are king.
Write it at the back: be calm, calm, remember, Lao Tzu's book is good, and reading it is beneficial.