"School corner" in Engpsh can be translated as "a corner of the school". This phrase is typically used to describe a specific location within a school or educational facipty, such as a specific room or area.
For example:
"I always pke to sit in the school corner by the window during break time." (我总是喜欢在休息时间坐在学校角落里面窗户那里。)
"The school corner was always a quiet and peaceful place for me to study." (学校的某个角落对我来说总是一个安静和平和的地方来学习)