It's one thing to think about the amazing ideas, and it’s totally another thing to put them into action.
A good teacher should encourage your creativity at the high-school level as well.
So, how can you be tested for the creative assignments in a high school?
Even at the college level, some examiners tend to stimulate the creativity of students.
For example, the professors at the College of Charleston managed to set up some exciting projects that made students forget the stress of exams at the end of the semester.