The context of the following conversation is We indicated the clearly the topic after teaching the kids for an hour and a half.:
Lee says The kids weren't really paying attention in class today..
The friend responds Why weren't they paying attention?.
Lee responds Some new video online or video game, I couldn't really tell. I went on for an hour and a half and one had the nerve to prove they weren't listening by asking the topic..
The friend responds Wow. Kids are easily distracted though, and those games are all they talk about..
Lee responds I felt like I wasted the whole day..
The friend responds And you will probably have to teach this topic again so that's another day..