Tough to believe but it’s a fact that maths has more in common with athletics than with any other educational subject. Best way to learn mathematics is to watch it first, practice it as much as you can and teach the concept to anyone as teaching polishes the concept.
When learning a certain concept, try to compile a list of steps to revise later. When your teacher writes examples on the board, copy them down as well, as to know how to solve them for future reference. You must participate in the lessons very seriously, and ask your teacher your doubts wherever you have any. By practicing the same at home, you will be able to better assess your areas of weakness and ask relevant questions.
Knowing maths properly needs regular practice. Whenever you learn a new concept, practice it thoroughly until you solve every sum you could possibly come around. But at the same time, don’t forget to practice old topics.
Immediately stop the habit of preparing all the night before the exam. Study in the way that in the night before the test, Revise Only.
A most important stage is teaching. This means actually using your knowledge to teach someone who knows nothing about the said concept. This could be a friend, sibling, or a co-aspirant. By teaching the concept, not only you perform the ultimate test for your understanding, but you are also able to remember it with much more ease.
This practice of watching, doing, and teaching, will ultimately help you better your performance in Mathematics. Make sure, do this for every concept and you will definitely observe the improvement.