Hello Loquman,

In order to score more than 90 percent in your PUC second year, you have to work hard. Revise the chapters properly in each subject. Make a study timetable and strictly follow it. Dedicate atleast 4-5 hours to studies. Practice and solve sums wherever required. Go through the previous years papers and check out for the most repeated questions and focus more on them. Keep practicing important derivations. Keep a track of what you have studies and what's remaining and complete that. Most importantly, have a good sleep and do not stress.

Good luck!