I am always concerned about making sure that all the content gets covered. A great method I learned from a seminar by L. Dee Fink author of "Creating Signficant Learning Experiences", is to require that the students do the reading and memorize the needed facts first and come to class prepared to discuss their application. To be sure that they are prepared there is a quiz at the begining of class for each student to take individually. Then small groups take the test together and have to come up with a consensus for the right answer. The resulting discussion during the group test is full of active learning techniques.