Nothing else really provides the security vs weight vs cost ratio like U-locks, which is why they're popular bike theft deterrent solutions. The longer the shackle they have, the more they weigh, the shorter the shackle, the less versatile they are. Scope out what you have to lock to at your campus destinations.

There's some real world evidence that the 'two lock method' provides greatly increased deterrence.

This leaves room for leverage and jacking and leaves you vulnerable to this (battery powered Sawzall, five seconds). This is more secure.