Authors & Presenters

Bill Barnes is the chief academic officer for the Howard County Public School System in Maryland. Bill was a recipient of the Presidential Award for Excellence in Mathematics and Science Teaching and has served on the board of directors for the National Council of Supervisors of Mathematics. Bill is passionate about working to ensure that students graduate with their dream intact.

Timothy D. Kanold, PhD, an award-winning educator and author, is former superintendent of Adlai E. Stevenson High School District 125, a Model PLC at Work® district in Lincolnshire, Illinois.

Erin Lehmann, EdD, currently serves as an assistant professor for the University of South Dakota. She is an author, leader, and facilitator, advocating for mathematics and high levels of learning for all.

Georgina Rivera is an elementary school principal with over 20 years of experience in public education. She works with educators and leaders to build collaborative teams and ensure all students receive high-quality mathematics instruction.