In some of our courses,we would lecture on the subject sometimes for hours then go to the lab and actively perform the activities we had lectured on. This works to an extent. One course I teach in particular, has made a big move toward the active learning style and I, personally, have been able to see a much improved outcome from it. Much of the lecture material has been converted to operating and testing instructions that the students use as they are physically able to experience the outcome of their actions in real time. This method seems to dramatically strengthen their understanding and gives them a much better initial grasp of the material and concepts.