I love this show but there's one thing that bothers me

And that's that there are 7 other kids in the class who never have a single word to say. Even in last night's episode which called for one of the other kids to give a line. The kid who actually delivered that line was a co-star with only one episode credit, not one of the extras who sits in that class every week. It's awkward that they never have any lines, and I feel bad for them because it's apparent now that they never will.