Whether they can scalably deliver these results is a next-level question.

I'd like an answer to a more basic one:

Of Alpha's current students, what proportion hit 2x or more of their Fall-projected growth on every Spring MAP test they took? (Across at least math and ELA.)

Joe confirmed that this is the specific commitment Alpha makes to parents, but no one from Alpha has, as far as I can tell, been willing to state how well they're meeting that commitment.

???