GCSE's, all loads of them
My Academy does something very strange - we start our GCSE's in Year 9, and we choose 2 options for Y9, Y10 and Y11. We do five hours of those options a week, and we sit the exam(s) in the same school year.
That way we can end up with 6 GCSE's+ (not including core subjects).
This year I had to do my English language exam (twice, even though I got my target the first time), a Maths exam, a Biology exam, a Physics exam, 3 history exams (+2 resits)...
So, this year has been very busy for exams
(Incidentally, you can find my school using only this info: Principal suspended, acting head applied, second ofsted report inadequate, placed on special measures, north west. I think it's a relatively OK school though...).