Okay, so the biggest thing I struggled with, this chapter, was this one piece of information that I was trying to fit into the flow of dialogue. I just couldn't seem to get Piggot or one of the Wards to bring it up without it feeling awkward or breaking up the flow of dialogue, and as exposition it felt forced.
How it works with the Wards is that most have the benefit of a 'co-op' program. Only a half day of classes, while they (supposedly) work for a given business or branch of government during the other half of the day, getting real life experience. At a given team member's discretion, mom and dad may be in the know or not, as far as what they're really doing.
All that said, remember, this is government. Making things more difficult than they have to be and covering one's own ass is going to be a recurring theme. Individual tutoring for kids that could be running/flying off on patrol every few minutes is not only hard, but it's an easy target for any politician that wants to come across as being out for welfare of the kids. So if a 'concerned' poliitican or member of the media points to these kids and asks why they aren't in school, the people running the program (like Piggot) can say they are, without perjury or prevarication. Giving them the structure of at least a half day at school just makes things a lot easier to manage and defend.
So yeah. Why did almost the entire team show up, against Tattletale's expectations? Most of the Wards weren't even in school at the time.
For New Wave, it's more about that whole accountability bit. They're celebrities, and that comes with all the constant attention and criticism to everything they do. Having your kids home schooled is going to make your group seem very insular when New Wave wants to sell the opposite impression. It's also quite likely that the various New Wave kids just want to go to school. Victoria likes the attention, and Amy is probably quite happy to have a legitimate excuse to get away from everything. I won't get into the other kids of New Wave just yet, but they probably have their reasons too.
From a writing perspective, though, you want your characters to be relatable, and something virtually everyone relates being a teenager with (for better or worse) is high school.
