2. Wait till it is exam time and work the whole notes in one week. This can help you to fail. I have tested this and it worked. I used to work the whole example of my math text book a few days to exam, and what I discovered was that during the paper everything jumbled in my head. I would have passed if I had started solving those questions a few months back; by then my mind would have been familiar with the questions and I could have solved them anywhere I met them.
It is possible to be good in math. When I was a JHS student I used to get an embarrassing 20% while I scored ‘A’ and ‘B’ in the other courses but today am a maths teacher but elective and core.