The burden of learning is on the apprentice. I am here to answer questions, but students must first try to use the tools to work with the material. In my workshop, one learns by doing, not by being told. This means that I have students read materials first, and do homework on their own, before coming to class. In class, I may provide additional material, or an opportunity to work with the materials they have.
Students working together in groups can help each other.
During the Middle Ages in Europe, apprentices came to work for various reasons. Some had a real skill in the craft. Others were sent by their parents at the age of seven, even if they had no interest. The master worked best with those willing to learn. I think the materials themselves create the interest.