You MIGHT be able to get a private loan at a better than 6.8%. Maybe if you had collateral to put up for it or a co-signer with excellent credit. However, most private student loans that I've seen have interest rates between 8-10%.
There are a few types of government loans available here in the USA. Subsidized stafford loans do NOT accrue interest while a student is attending at least half time. Unsubsidized stafford loans begin accruing interest from the day they are dispersed. There are also Perkins loans which have a 5% interest rate and have subsidized interest. Those are administered by the institution you are attending, however, so I imagine the availability would vary.
Starting next school year, though, subsidized stafford loans will no longer be available, due to the budget cut bill that was recently passed.