Teachers expand conceptions of algebra using interactive tools, video conferencing and social media.
Heather Lynn Johnson, firstname.lastname@example.org, is an associate professor of mathematics education at the University of Colorado Denver. She is interested in middle and high school students' quantitative and covariational reasoning.
Peter Hornbein, email@example.com, has taught high school mathematics for twenty-seven years and has taught at Cherokee Trail High School, Aurora, Colorado, for the past eight years.
Dana Bryson, firstname.lastname@example.org, is a middle school math teacher at Evergreen Country Day School, Evergreen, Colorado. She is in her eighth year of teaching middle school math.