College campuses are notorious for being hotspots for professional bike thieves.
A smart thing might be to get a really JUNKY UGLY old bike for commuting to classes with, if you are going to leave it locked outside for hours. I would not recommend bringing a brand new $600 road bike to campus- thieves would be right on it. If you can bring your bike inside to classes with you then perhaps that's safe, but you might have trouble with that.
Even a junky ugly old bike needs a good lock on campus to keep from getting stolen, but at least you'd not be out a bunch of money. Get a good heavy lock no matter what bike you use.