Department Chair, Leadership and Educational Studies - Appalachian State University

Professor of Philosophy of Mathematics Education

Distinguished Professor of Education, University of Houston

University of Missouri--St. Louis

New York University, Simon Fraser University

Associate Provost for Faculty and Academic Excellence @ SUNY Empire State University

Institute of English Studies, University of Warsaw

Tampere University

Senior Lecturer, Computer Science Education, North-west University

Professor of Biology Education, University of lagos