Jennifer Bay-Williams is a mathematics teacher educator at the University of Louisville, Kentucky, and focuses on helping teachers and students attain basic fact fluency while also developing strong mathematical identities.

Bay-Williams is a national leader in mathematics education, having served as a member of the National Council of Teachers of Mathematics (NCTM) Board of Directors, president of the Association of Mathematics Teacher Educators (AMTE), lead writer for the Standards for Preparing Teachers of Mathematics (AMTE, 2017), and member of TODOS: Mathematics for ALL.

She has written various mathematics teaching books including Elementary and Middle School Mathematics: Teaching Developmentally and the three-book series Teaching Student-Centered Mathematics.

Gina Kling is an instructor in the Department of Mathematics at Western Michigan University. She has worked as a curriculum developer and is the author of the elementary mathematics curriculum Everyday Mathematics (based at the University of Chicago).

Kling also worked on four State Editions of Everyday Mathematics, Everyday Mathematics 4 Quick Looks Activity Book, and Everyday Mathematics for Parents: What You Need to Know to Help Your Child Succeed. She has also coauthored a series of articles on teaching and assessing basic facts (NCTM publications) and a book on basic fact fluency, Math Fact Fluency: 60+ Games and Assessment Tools to Support Learning and Retention.

Kling has taught elementary mathematics content and methods courses for the past 15 years at Western Michigan University in Kalamazoo, Michigan.