He is a four-time honoree as Teacher Of The Year, and he has been awarded both the Thomas J. Reid Excellence In Teaching Award and the Powers Family Teacher Recognition Award. Mercer's core disciplines are American history, language arts, media literacy, and financial literacy. He brings experience to his teaching from the fields of business consulting, marketing, and publishing. Mercer has coordinated workshops for faculty and has presented on literacies and curriculum design at national conferences, such as the National Council for the Social Studies, the Association for Middle Level Education, the International Visual Literacy Association, the New York State Computers and Technologies in Education, and NYSAIS Teaching with Technology.