Loren Santow has been a freelance photographer in Chicago since 1982. His professional website can be visited at lorensantow.com. Loren is also an editorial assistant at the Center for Elementary Mathematics and Science Education(CEMSE) at the University of Chicago, which writes the PreK-Grade 6 Everyday Mathematics curriculum. Loren currently works on the Kindergarten, PreKindergarten, and Grade 4 portions of the program.