I study every day.

The word for school is gakkou. Teachers are sensei and students are gakusei (or seito). College is daigaku (literally "big school"). A college student is daigakusei. In order to say what grade you are in, or whether you're a freshman-senior, you say "I'm a --year student." Where -- is replaced with the correct year.
ichinensei ninensei sannensei yonensei nen Ninensei desu.	first year student second year student third year student fourth year student year I'm a second year student.
To say "I am a student at the University of ----" you say: ---- daigaku no gakusei desu. or ---- daigaku no seito desu. This also works for other types of schools like high schools, junior highs and elementary schools. Just insert the name of the school in place of ---- and the type of school in place of daigaku. Note that elementary school students are not generally called seito or gakusei, but jidou(children or juveniles). West koukou no seito desu. I'm a West High School student.
Examples: mainichi kinou asatte	every day yesterday the day after tomorrow
Students of course also do a lot of shukudai (homework). To do homework is shukudai o shimasu. The verb "to do" is shimasu. Let's try a few sample sentences now.
Examples: Mainichi, nihongo o renshuu shimasu.	Every day I practice Japanese.
Mainichi, eigo o benkyou shimasu.	I study English every day.
Asatte, nihongo o renshuu shimasu.	I will practice Japanese the day after tomorrow.
Kinou, suugaku o benkyou shimashita.	Yesterday, I studied math.
Asatte, nihongo no shukudai o shimasu.	The day after tomorrow I will do Japanese homework.
Kinou, suugaku no shukudai o shimasen deshita.	I didn't do the math homework yesterday.
Vocabulary: ichinensei ninensei sannensei yonensei daigakusei seito gakusei sensei nen mainichi kinou asatte daigaku koukou suugaku shukudai benkyou shimasu renshuu shimasu	freshman/first year student sophomore/second year student junior/third year student senior/fourth year student university student student student teacher year every day yesterday the day after tomorrow university/college high school math homework to study to practice