Now AT COLLEGE, courses are specific and interesting "In college" refers to a period of time, and "at college " refers to a place. 1. When IN high school, students attend almost the same courses in the troditional classrooms. Could I say" When AT high school, students attend almost the same courses in the troditional classrooms"? 2. Now AT college, courses are specific and interesting. Could I say "Now in college, courses are specifc and interesting"? Are both "in" and "at" OK in the above sentences? Thank you.