Motivation in schools.

People learn best when they are intrinsic motivated. Without fear from the outside, fear of tests or expectations of parents, friends, bosses etc.

Wanting to find out how things work. This is the starting of learning. Curiosity. 

The only external factors which have an influence are the bumps in the road along the path of learning. And, reality always has a safety net. 

Also, when you grow older, you have learned in school, in life, that not succeeding = failing. But this is not true. If you keep having that belief, you will never learn something.  

Maybe failing = succeeding, because you win you are learning. You gain.