I think it is something like a certificate for labour/education. Found it in a charity shop in the UK.
I'll give it a stab:
Congratulatory Certificate
To a female student of 5th grade (Group A, I think) in school number 528.
Kirov area of Moscow. (edit: Kirovskiy raion, not Kirov, sorry)
Shereshevskoi Agari
For excellent achievement and exemplary behavior.
(below on the left)
City of Moscow
7th June 1938
Number 2
You may also want to try /r/whatisthisthing.