So, I am completely new to this as I didn't take out any undergraduate loans.  I do not have any adverse credit history or anything like that.  The cost of attendance at my school is $36,606.00 per year (9 month period), living included.  I have been offered the maximum in Stafford Unsubsidized Loans and have a $1,000 Tuition Waiver per year, totaling $21,500.00.  
If I take the full amount in my Stafford, what are my options to make up the difference of approximately $15,106?  I know there are Grad PLUS Loans.  I am wondering if I could borrow the difference with those?  
 If someone could shed some light on this, I would greatly appreciate it!  

  I am trying to avoid using private loans if I can avoid it.