I tried taking notes in class, but couldn't concentrate on what the teacher said versus what I had to write. they made no sense, so I gave up on note taking and concentrated on what teacher said.
Changed schools sophomore year, and my grade depended on my notes being turned in. Quit school. Took my GED test without any adult ed classes, and ended up in the top 10% in the state.
For some, taking notes is not only not necessary, it is actually detrimental to their thought processes.