kyou ni watashi gaku ni ikimashita (kee-oh ni wa-tah-shee gah-ku ni ee-kee-ma-shtah) literally 'today I school to went'
Although you should specify what kind of school.
High school: kougaku (koh-gaku, elongate the 'o' in shou)
Primary school: shougaku (shoh-gaku, elongate the 'o' in shou)
See the related link for Google's translation.
ikimashita
Today is 'kiyou' in Japanese. im hindi it is aaj
学校にいた is how you say I was at school in Japanese.
kazan ni ikimashita
gakko no kamoku
Kyou, doko ni imasuka?
It is grammatically correct to say , "I am in school today." This is because you are in the building, not at the building.
Nyūsatsu no gakkō
kyou no jigyo WA nandesuka
Kyō wa totemo kodokudesu
Kurai kage gakkō