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Some schools may also require you to take one or more GRE Subject Tests. The purpose of each GRE examination, of course, is to help graduate schools decide if you've got the right stuff for their program. If you're looking for help with the exam, check out Peterson's full-length GRE practice test.
In short, retake GRE only if you've made a mistake, and your score was significantly lower than the one you did during your preparation. Note: For School of Engineering Only.1  Arizona State University (Fulton) (AZ). 2  Auburn University (Ginn) (AL). 3  Boston University (MA). 4  Brigham Young University (Fulton) (UT).n short, retake GRE only if you've made a mistake, and your score was significantly lower than the one you did during your preparation. Note: For School of Engineering Only. 1  Arizona State University (Fulton) (AZ).