Learning requires an act of initiative on their part. We can only create conditions in which learning can happen. As teachers it is our job to give students the information they need in order for them to learn. How they manage to learn that information is our responsibility. On a different note, how they teach it to themselves is entirely up to students.
Motivation comes from within.
As teachers we should model what it means to be motivated by being animated and lively when they teach. Their love for the subject needs to shine through. When I was teaching my life-cycle lesson on butterflies, I did not once have students write. Through a KWL chart, questions were asked. Now that I think it over, it would have been so neat for me to see what children would have asked.