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By John Hellermann. John Hellermann is an Assistant Professor of Applied Linguistics at Portland State University where he was a researcher for the National Labiste for Adult ESOL for four years. He previously taught in public school and community college settings in Wisconsin and Hungary.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.