Sleep...What time should I go to sleep on a school night?Watch
At school I went to bed around 10-10.30 and woke up at 6 so had around 7-8 hrs of sleep
12-18 year olds need an average of 8.5 - 10 hours sleep!
Are you doing them this year, or just starting the syllabus? I started my GCSE syllabuses for science at the beginning of year 9.. Doesn't mean I was freaking out about the exams then.