I teach at the same facility as Mr. Robar and students are tired and quickly fall asleep whether its 6 in the morning or 12:30 in the morning when our night class ends. While the boring lecture is sometimes a necessity, I try to keep students active by asking a lot of open ended questions during the lecture. Most of our lecture has a power point that students follow in their books. During this time I also add my comments and explanations in writing on the board. I'm never surprised to turn around and see everyone taking notes. Doing Q&A with a nerf-ball where students ask questions and throw the ball to who should answer is a good "Pep-up" and giving small rewards (candy, pens, pencil toppers from the Dollar store) always keeps my students going.