agree with ericwuyq on 4th floor. :)

Plus, you can claim certain tax credits with R status, such as education credits.

If you or your dependent paid qualified expenses in 2007 to enroll in or attend an eligible educational institution, you may be able to take an education credit. See details on page 37 (instruction of 1040, line 49). you may receive a 1098-T form sent by your school.

However, if you have tuition waiver or scholarship that covers tuition, then you are not eligible.