I've had six weeks of lectures for my part-time commerce degree, and they're going well. I find the evening to be a good time for lectures, as I'm fairly alert at that time of day. I actually concentrate better during a 3 hour lecture beginning at 6pm than during a 1 hour lecture beginning at 2pm. Come to think of it, I'm being paid to deal with the mid-afternoon torpor, then getting to work on my own qualifications during a peak period.
It probably helps that the subject material has been interesting. I'm particularly enjoying introductory microeconomics, which is a nice blend of cynicism and simple graphs.