Robert Tinker, President Emeritus, is internationally recognized as a pioneer in constructivist uses of educational technology. He developed the "probeware" and Network Science concepts and has directed numerous educational research projects funded by the NSF and the Department of Education that have led to widely used improvements in science education. He founded the Concord Consortium and pioneered its early online courses for students and teachers. More recently, he has spearheaded the development of powerful computational models that generate virtual worlds that students can explore. He holds a Ph.D. in experimental low-temperature physics from MIT.