I will launch Khan Academy's new proficiency model to a subset of users.
Created by divad12 on 2011-10-21; known on 2011-10-22
- divad12 estimated 50% on 2011-10-21
- divad12 withdrew the prediction on 2011-10-22
- divad12 said “Friday’s not good for launching large changes” on 2011-10-22
Please log in to respond to or judge prediction