Physics, Chemistry, Biology are examples of science topics that need for both theoretical and practical understanding. Students can jot down all the definitions and key points individually to get ready for these courses. Regularly review all the theorems, chemical equations, and pictures. Make brief notes about essential subjects. No uncertainty should remain unanswered. If you have any questions, ask your professors or elders. Mathematics: There is no simple technique to increase your math score; it takes practice and more practice. Solve problems from textbooks and other reference materials by learning all the formulas by heart. Keep an eye out for errors and weak points. The only way to excel in mathematics is to practice more; the more one practices, the better they get at it.