I have experienced and observed tremendous volumes of energy going to waste. This energy is expensed by parents, teachers, guides, coaches, tutors, mentors, instructors and seniors in trying to teach and train some one. This energy is expensed when we think that having told some thing to some one automatically makes him or her learn it.
We only learn by doing some thing ! Make them do it and make them think to do it. They would learn and perhaps never forget.