I wonder if that is counting lab time. In the hard sciences those can be a killer. "Quantitative Chemical Analysis", that lab seemed to go on forever. Electronics labs were the roughest because they were open and if you "got it" you were done in an hour, or if not, well, that might be a very long day for you. I distinctly remember a microcontroller class where I had 9 years of in family experience (Motorola 8 bit) and I'd be outta there in a half hour but there would be classmates putting in 8 hours because they didn't really understand imperative programming or whatever.

In the olden days computer science programming was done in labs because few people had the precise combination of machine / OS / compiler / IDE to match the class requirements, things are a little better now...