YOU SAID:
yes, I'm on senior high school
INTO JAPANESE
はい、私は高校生です
BACK INTO ENGLISH
Yes i am a high school student
INTO JAPANESE
私は高校生です。
BACK INTO ENGLISH
I am a high school student.
INTO JAPANESE
私は高校生です。
BACK INTO ENGLISH
I am a high school student.
That didn't even make that much sense in English.