I also would like to know the answer to this question.

Hi ammberg,

MAP Accelerator is a personalized learning program that empowers educators to create differentiated learning experiences. MAP Accelerator uses MAP® Growth™ scores and Khan Academy’s personalized learning system to provide each student with a custom learning path, while educators get insights and data to inform instruction. 

Each student’s personalized learning path includes recommended practice problems, instant feedback, scaffolded help, personalized spiral review and instructional videos and articles.

If your district is interested in purchasing MAP Accelerator, please contact NWEA for more information.

And the MAPPERS platform is Khan Academy's free prototype for teachers to use with their classrooms. Here is an article that speaks more in-depth on how to access and start working with Mappers here at Khan Academy. 

I hope this helps!