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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.
The GRE General Test is offered as a computer-based exam administered at Prometric testing centers. In the graduate school admissions process, the level of emphasis that is placed upon GRE scores varies widely between schools and between departments within schools.