In September 2015, with support from the National Science Foundation (DRL-1514726), TERC and the Institute for Learning Innovation launched the Math in the Making project to engage the field in discussions about the relationships between mathematics and making and, in particular, to consider how integrating the two might both enrich making experiences and support mathematical learning and interest development for children and adults. The collaboration included a national workshop with leaders from informal education, mathematics, and making and tinkering; a pre-workshop online discussion; a