Geralyn M KoeberleinBefore her retirement, Geralyn M. Koeberlein taught mathematics at Mahomet-Seymour High School in Mahomet, Illinois, for 34 years. She taught several levels of math, from Algebra I to AB Calculus, and spent the last few years of her career as chair o the Math and Science Department. After receiving her Master's Degree from the University of Illinois early in her teaching years, Geralyn continued her education by receiving over 90 hours of post-graduate credit. She is a former member of the ICTM and the NCTM. Read More Read Less