Question

проверьте грамотность нескольких  английский предложений 

My mother studied Vichuga school №13 (моя мама училась в Вичуге в школе№13)
Discipline was very strict in school  (Дисциплина была очень строгая в школе)
After-school were very active. They went to different cities, visiting circuses and theaters ( действия после школы были очень активными. Они ездили в разные города, посещали цирки и театры)
They wore mandatory pioneer ties (Они носили обязательные пионерские галстуки)

Answer 1

My mother studied in Vichuga in school №13. Discipline was very strict in school. After-school activities were very popular. They went to different cities, visited circuses and theatres.They were required to wear pioneer ties.

Answer 2

My mother studied in Vichuga at school №13. 
Discipline was very strict at her school.
After-school activities were very popular.
They went to different cities, visiting (посещая) circuses and theatres. или They went to different cities, visiting (посещали) circuses and theatres.
They were required to wear their pioneer ties.