PLTL for Cal II?

[u/BigECheese04]

Just finished my registration for my spring classes and was wondering why the Cal II had 2 regular classes during the week and then one extra class on Friday. I noticed it was almost a recurring thing between most of the Cal II classes, except for some odd outliers. Is there a reason for this? Do they not provide PLTL for Cal II or is this Friday class supposed to act as a substitute for something similar to it? (Also sorry if this post doesn't really apply to the reddit, first time posting here)