Thank you everyone, for the helpful inputs. Truly appreciate them. We plan to visit Basel in about a week, and will look up both International Schools to get a first hand look. Any inputs on specific aspects we should check out, during school visits ?

I did not realize that space may be an issue ( our son attends a great public school in Ohio - so everyone gets in) - thanks for pointing that out. I dread the thought of moving him mid-year . I might consider just staying here in Ohio until he finishes Grade 11, while my husband moves on ahead. Then we might have an option of moving him into Grade 11 or into Grade 12 in the IB School ...... wondering about pros/cons of holding him back a year by getting him into Grade 11 in the IB program, vs getting him into Grade 12 in IB program from Grade 11 in US standard program. Son's education seems to be the toughest part of our decision making process.