>>14314031Let them salvage themselves. Allow repeat applications every 2 years and make it public the kind of stuff on your entrance exams. Issue exams with just beyond the normal grade level of content so applicants have to put in some self-directed study. You don’t need to rescue damaged goods, once you have a reputation other organizations will pop up and try to do that for you.
Select first for students who are already good to go, the others can come later.