Ellen Hajek is a college professor and professional writer. Before coming to her current position at Red Rocks Community College in Lakewood, Colorado, she taught in Nebraska, Iowa, and Colorado public schools, in addition to the Colorado School of Mines. Hajek also engaged in freelance writing for magazines, newspapers, and educational publishers. Later, she was employed as the development coordinator for the Cleo Wallace Center in Broomfield, Colorado. In 1994, Hajek began her own publication business, focusing on developing educational materials for home-schoolers and for children with learning difficulties. Hajek's publications include HUMPTIES, Parts of Speech with "Eggceptional" Personalities (now with Builder Books); BUILDING SENTENCES with the HUMPTIES (Builder Books); DIAGRAMMING, the Key to Understanding Grammar (Builder Books); and THE "HOW TO WRITE" BOOK (Teaching & Learning Company).