One of the developers said it is frustrating to follow long book tutorials..
In my classes I try to give a whole solution in couple of hours, so people don't get discouraged. After you have basic idea how things work, start developing your own app instead of following the tutorials, find one solution after another for exactly what you need. That is my approach.
Also, getting together with other developers and programming and talking about solution helps as well. in Chicago Android we are trying to do just that; training and developers meetings.
The next full day training is on September 25th: