Thanks, all, for the responses. It's nice to be able to bounce questions off of the collective expertise of the forum. Kerry-- glad you've heard of some GT kids who've done well in IB! The potential ability to go in depth on assignments interested us for DD. Bostonian--thanks for bringing up the values part of it, also important. For our family, IB is an excellent match in that respect. Eldertree-- you're right, depends on the kid. My DD3 is too young to call as to whether or not it will be a good match. We'll see how it goes for her!