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Each school you add gets chanced per major, with the round you'd apply. This is the one part the thread needs.
Add at least one school and the thread can start chancing you.
Applies to every school unless you set a different one per school. “Undecided” is fine, and can even help at some schools.
More detail = more accurate results. Try adding some academics!
Add at least one school to post your thread. Everything else is optional.