Anything you feel passionate about. Make a list, and check the third one on your list as the one to write about.

The usual learning began. Every morning I had to get up early, go to school, and do my homework. Only the intensity of learning has changed due to the fact that this is my last year at school. I began to prepare myself for exams at an accelerated rate. I studied with tutors - at home and at school. Also I studied mathematics and other subjects by myself with the help of the internet. Then I spent a lot of time on self-education. As my experience showed, self-preparation for exams is even more effective than classes with tutors. But in order to study regularly, you need to have a high level of self-discipline. The essay was very helpful to me https://essaystone.com/blog/120-argumentative-essay-topics/ . Looking ahead, I will say that my efforts were not in vain: I passed my exams successfully. This allowed me to realize my dream and enter the university as a first priority.