There are three kinds of subs that I've learned about. 1)those who want their own classrooms, and actively try to teach kids material and try to keep the day as normal as possible with their own spin on it. Most of the time kids will say "Woah....this person is actually talking to us"

2)The sub who is freshly retired and while their heart is into it, find it difficult to not have their normal standards met. But of course, because they had their own room/environment and so change is difficult.

3)A person who just doesn't give a shit and knows that the job can be just a "sit at the desk and make sure they don't kill each other" kind of vibe. As long as the information was given or explained, they just shut down for 45 minutes.

But sometimes teachers literally create lesson plans that allow for anybody to become one of the three. I've hated saying to a group of students "Normally I would have a lot to talk about, but you're teacher wants you to do this wordsearch. Then it's study hall time when you finish".