We are students at/in...
Here are some examples:
* Somos estudiantes en la universidad. (We are students at the university.)
* Somos estudiantes en el extranjero. (We are students abroad.)
* Somos estudiantes en español. (We are Spanish language students.)
* Somos estudiantes en la clase de química. (We are students in the chemistry class.)
The preposition "at" or "in" is used depending on the specific location or context.