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MARK WAHL is owner and director of Mark Wahl Learning Services in Washington State near Seattle. Among his several pursuits he taught a very successful GRE Prep course at the University of Washington Women's Center. In the 90s and 2000s it earned praise from thousands of satisfied Seattle area students. Now you can get Mark's expertise in a more intimate, dramatically improved GRE prep course tailored to the revised test, by simply registering on this site. Mark wears other hats too. He has been both a mathematics learning specialist since the 70’s and a test preparation specialist since 1986. He is also an author of 4 books for teachers and a professional development trainer of many hundreds of teachers... Learn More>>>