What is the MAP Accelerator?

Hi everyone :)

I'm a new Parent on Khan Academy who's also managing a class with 30 students, one half signed up for Khan Academy & with a plan for next year, and the other half not signed up for Khan Academy & with no plan at all. I heard everyone going blab blab blabbing about the MAP Accelerator, but I don't understand what it is - what is it?

From
A Parent + Teacher on Khan Academy