Ahh I'm glad you posted this!
There's grammar mistakes here and there. Um...
When you describe the characters, it's done very simply. You don't really go into a lot of "depth" with the important ones (and you talked about the teacher more than necessary.) I feel like your description of Gerard was a little awkward, just sentence after sentence that could have been connected, and plus when you just physically describe someone outright, the story doesn't flow.
You probably shouldn't speak in present tense, because when you tell stories, usually I think it's in past tense. (Like, "said" instead of "says", stuff like that.) However, I do know people who can do that well, so that's kind of a fuzzy line.
You said the word "well" a lot. If you're going to keep a conversational tone, it needs to flow without you stopping to say something.
I also wish that you'd expanded on the plot a little bit more. I understand that this was a kind of fluffy oneshot, but you could have continued a little further.
I'm sorry, I'm not the best critic. I just saw these mistakes. Good luck with your future writings!