MaryLou:
You'll find that two standard rooms are typically cheaper than the family suites at the
Value Resorts, after all, you're getting a microwave and kitchenette area. But keep in mind that Disney doesn't guarantee connecting or adjoining rooms (which, you need to know, are side-by-side. If you want an interior door connecting the rooms, ask for a "connecting" room.) The sooner you make your reservations, though, the better your chances to be near each other.
The advantage of the Family Suite is that you're guaranteed to be together and you can make up the sofa, chair and ottoman for communal space, which is better for teenagers than sitting on beds, in my opinion, to visit in the morning or at the end of the day.
Wishing y'all a magical vacation!
Whitney