Reason No. 1- School marking

Schools mark unfairly. Last year most students in my year got a good mark for their coursework. So instead of condoning us for doing well and achieving, they mark us down this year even though we worked as hard as last year. This isn't even the only example, the government has been changing tests every year to make them harder because students pass. Is that not the point of school? To learn and be able to get good grades? Why are teachers surprised when students pass? Maybe they should be making it harder to be a teacher instead of making it harder to be a student, I know I've had some awful teachers.