Hi sverma,

Khan Academy does not currently offer the ability to add a co-teacher to a class. The account that created the class is currently the only one able to see scores and manage the assignments for the class.

There are, however, a few workarounds for multiple coaches to be able to view students' progress, as listed in this article: https://support.khanacademy.org/hc/en-us/articles/203610350-Can-a-user-have-multiple-coaches-Is-there-a-way-to-add-a-co-teacher

I hope this helps! Please let me know if you have any further questions.