Ryan I don't think you'll find a larger ad network to join. You should filter those ads out in AdSense. More information on filtering ads here http://support.google.com/adsense/bin/answer.py?hl=en&answer=180609
Also you can choose to display ads which are paying higher than what Google may be showing. So if you have a private advertiser or you are part of another network I believe you can tell Google if their ad's aren't going to pay a certain amount to display ads from your other networks.
You should look into signing up as an affiliate for websites such as snorgtees which does a lot of advertising on college related websites. This is just one example http://www.snorgtees.com/affiliates there are plenty of other related sites which have affiliate programs. Either their own in house system or they may be part of Google Affiliate Network, CJ.com or others.
You can also sign up with Amazon associates and pick products to display on your site and earn commissions on any sale of any product on Amazon.com once a visitor clicks thru your links.
Keep AdSense, take the time to filter out UoP, Full Sail, Devry and the other big name advertisers. Try affiliate marketing along side AdSense. One last suggestion is if spring break is something you want to monetize on. Check out the affiliate programs from Expedia and other travel websites, you can probably display ads for all inclusive trips to popular destinations like Cabo, Daytona Beach etc.
Section targeting: https://support.google.com/adsense/bin/answer.py?hl=en&answer=23168&ctx=cb&src=cb&cbid=-qqh7yi9yntbe&cbrank=1