In my school year 11 rankings don't correlate to year 12 rankings. Many people with high potential didnt really care about year 11 and used that time as prep for the next year. Year 11 is the year to make mistakes, my advice is do your best in year 11 and pick up on these mistakes before year 12...
This question depends on what type of learner you are. For me, physics is the hardest. It requires understanding, application and calculation. If you aren't so great with memorising then you would say bio ( I don't personally do this subject). Chemistry to me is largely content based with a few...