lol my own schools grading system may differnt as well, I think 90's are not to difficult in other schools, but at mine a 90 is nearly impossable, so 60's are average, it is a univarsity prep school though, and we start doing 1st year univarsity level work in grade 11, I mean they do mark slightly easier then univarsity but WAY harder then your average high school, this is to prepare us for univarsity though, and it works, students from my school consistantly do better in univarsity then students from any other school in the city lol