The UK’s undergraduate education system is a compressed four-year course into three years, and the overall curriculum is very tight. Imperial College is divided into three semesters each year, with a total of eight courses from first to the third year in the Mathematics Department, four courses in the first and second semesters, exams and projects in the third semester, all compulsory in the first year, two to three electives in the second year, and eight electives in the third year. Each course has about 30 hours of class time. In my first year, I did not have a proper grasp of the study method, and I was too busy experiencing the freedom of university life, so my grades were not very good. In sophomore year, the average score improved by about 20 points. The third-year is probably the most critical year, with more than 50% of the marks being weighted. All in all, grades are quite important.