I had an 8:15am or 9:00am class and I was struggling to get enough sleep. In the middle I told the instructor that I was going to skip lectures so I could sleep

I had an 8:15am or 9:00am class and I was struggling to get enough sleep. In the middle I told the instructor that I was going to skip lectures so I could sleep better. He didn't like that idea. I went ahead with my plan and used Khan Academy to get the material. My grade increased in the second half of the course.