Let's say I think I am dedicated (I know you'll have your own criteria on identifying my dedication). Say that I am in high school. How do you expect me to study during your defined hours full time? The best I could think of is dedicating my full time hours during summer vacation (if I have to let go of my part time job, camps, or home-work - testing, AP etc).
The same would apply when I am in college trying to get a degree.
In addition, I also don't see how any full time working individual could find time to accommodate learning schedule during the day. Say that I may be looking to change career.