Charles Hohensee is an Associate Professor in the School of Education at the University of Delaware. He received his Ph.D. in Mathematics Education from San Diego State University in 2011. Hohensee’s research examines the phenomenon of backward transfer, which is about how learning something new influences a learner’s prior knowledge. Hohensee has published a number of articles on transfer and backward transfer. Joanne Lobato is a Professor of Mathematics Education in the Department of Mathematics and Statistics at San Diego State University. Lobato has a long-standing interest in the transfer of learning, having developed the actor-oriented transfer perspective and served as the transfer strand editor for the Journal of the Learning Sciences. She also conducts research on learning from dialogic videos, student noticing, and relationships between teaching practices and student learning. Lobato is an associate editor for Mathematical Thinking and Learning.