Mark Wahl is Owner-Director of Mark Wahl Learning Services near Seattle and principal instructor of this online GRE Prep course. He is a decades-experienced mathematics learning specialist and test preparation coach. Having been an accomplished test prep teacher of the math and verbal parts of the SAT, GRE and GMAT tests he knows the thinking and decoys of their test-maker, Educational Testing Services. He also uses the Nobel-nominated brain research to help students strategize novel approaches to questions so as to utilize more of the brain’s capacity. Additionally, he is an author of four books and a professional development trainer of many hundreds of teachers. Your math, verbal and writing prep for the test is in good teaching hands!