Dr. Lorelei Coddington is an Associate Professor in the School of Education at Biola University in teacher preparation and has over 20 years of experience in K-12 education. She has been a post-doctorate fellow, K-12 researcher, teacher on special assignment, and elementary teacher. Dr. Coddington has worked extensively coaching and mentoring beginning teachers in effective pedagogy. Her research examines the influence of professional development on teacher knowledge growth and elementary mathematics learning and instruction. Dr. Coddington has conducted research in two multi-year research grants working directly with K-12 teachers to improve classroom learning of mathematics. Her research findings have been shared at national conferences, and she has several publications focused on mathematics instruction and learning. Dr. Coddington can be followed on twitter @2teachprof.