Depends on the situation..

In the summer and on the weekends, when I am actually going somewhere fun, I wake up early and am fully awake about 20-30 minutes later.

To wake up on a school morning, well that's the opposite..hehe. My sister gets me up at 6:00 and I stay in bed for about 10 more minutes. At 6:10 I get up and get ready. I'd say I'm fully awake at around 11:50 AM when I go to lunch, then I'm fine. Too bad after lunch I only have 2 more periods left of school.