Something to keep in mind for the younger son though, and this really entails conversations with the GC to understand the HS’s success with college matriculation, is that IB,and particular IBDP, is not right for everyone. In particular, STEM students, especially those on an advanced math track, will find IB rather constraining. On the other hand, IBDP students invariably get the “most demanding” coursework checkbox automatically, whereas those students not doing IBDP may not. But again, none of us know that HS’s policies. Good luck.