
I used to teach middle school, hugs to you!
They are typical tweens. Puberty is rough and I would not want to go thru it again. If i had a nickel for every girl that ran into my classroom crying...7th graders were always the worst - is that your 13 y.o.?
Don't cancel, they may need some re-adjustments at home.
With the 11 y.o., create the rule that she has to do her hw first, then can go out and play. And you have to check it. If she has an assignment book, look at it when she gets home, help her prioritize what she needs to do and get her started. Or give her a set limit like 30 minutes to play (at 11 they still need to get out there and play!), then time to come in and get to work. Most kids at that age need help with organization and do not realize how long it can take them to do their homework. Like a PP said, it's the best age to learn this lesson.
PS - Ditto to the PP that said no cell phones for the kids on vacation! Oops, you forgot them at home! Whoa, what happened to the battery? Oh, no carger? Shucks...
Your 13 y.o. is going thru typical drama. Let her. Be calm, don't react to her and fuel the fire. She doesn't like your rules, too bad. Stay firm on your rules and when she breaks them, follow thru on your consequences. Kids need and want adults to set boundaries for them. Be the parents, not the friend. A vacation with a few days away from her friends (and her need to be super cool) might be a good thing. It's amazing how different teens can be when not under the judging eyes of their peers.
Good luck! My girls are little, but also two years apart. I know that the drama is coming my way soon enough
PS -- Ditto to the PP that said no cell phones for the kids on vacation. Ooops, left them at home! What happened to the battery? Left the charger at home? Aw, shucks...