What's the hardest thing about personal learning?
What do you think are the barriers, impediments, problems when trying to learn new things that you are intersted in, out of formal coursers or schools ?
Validation. It’s difficult to recognize where your comprehension of a subject is limited when the most common performance measurable is question/answer testing.
How many great answers are discarded as they lack conformity? How do we change formal education to encourage more creation instead of mostly repetition?
Time and commitment... for me at least...