His primary professional duties involve the preparation and support of K-12 preservice and inservice mathematics teachers. His research interests focus on instructional uses of technology, with particular interest in the use of dynamic geometry software and computer algebra systems in the teaching and learning of school mathematics. Since 2001, Todd has authored over 30 peer-reviewed publications related to this work. Todd has been a co-editor of the Ohio Journal of School Mathematics since 2008, is a co-founder of the GeoGebra Institute of Ohio (GIOhio, the first GeoGebra Institute in North America), and editor of the Midwest GeoGebra Journal.