How do you describe your school in French?

You can say:

'Mon ecole est petite' <--'my school is small'

Mon ecole est grande' <--'my school is big'

'les cours sont interessants' <--the classes are interesting.

'les profs sont intelligents' <--the teachers are smart.

'les profs sont amusants' <--the teachers are amusing.

to say 'i am a student at ________. you say 'Je suis eleve a _________. for example; Gardens High School would be 'Je suis eleve a Gardens lycee. Or you can just abbreviate it by saying 'Je suis aleve a GHS.'

hope i helped.