Thread:Cdragon13/@comment-29331244-20140123134059/@comment-18063949-20140123135808

Okay, pretty good so far but here is a revised version gramatically:

"Harshit Kaphur joined Khan Academy on Dec 2011 - Jan 2012. He came for the challenge to do all the exercises. He wondered about the Tesla achievment and started to check throught the K.A. files.

Later he asked Chris Hohmann and Alex Roodman to test his research, which was sucessful. He never showed what work he did and not many people knew him. He left K.A. in 2013."