You may say 'gakkou.'
学校 (gakkou) is the general name for school, however you will most likely hear people discussing different levels of school rather than saying just saying school.
小学 (shougaku, elementary school)
中学 (chuugaku, middle school)
高校 (koukou, high school)
大学 (daigaku, college)
大学院 (daigakuin, graduate school)
学校にいた is how you say I was at school in Japanese.
gakko no kamoku
Nyūsatsu no gakkō
Kurai kage gakkō
A school's "sports day" is called 運動会 (undoukai) in Japanese.
'Welcome to school' would be学校へようこそ (gakkou e youkoso) in Japanese.
Dojo, pronounced dough-joe.
Konesiwa da mean be sola
See the related link for Google's translation.
学校、素敵な学校 (gak'kō, suteki na gak'kō)
A Japanese language school teaches Japanese (by definition).
how to say "editor" in japanese