Hello,<br/><br/>Which is correct?<br/><br/>Economics is taught at various univerisities<br/><br/>Economics is taught IN various universities<br/><br/>and<br/><br/>Classes at universities vary according to the semester<br/><br/>Classes in universities vary according to the semester<br/><br/>AT OR IN?? ANyone who can give me a definitive answer?<br/><br/>Thank you!!!!!!!!