Tracey E. Hall, PhD, is Senior Research Scientist at CAST, a not-for-profit research and development organization whose mission is to improve education for all learners through innovative uses of multimedia technology and contemporary research in the cognitive neurosciences. Dr. Hall has more than two decades of experience in the areas of curriculum-based measurement, teacher professional development, special-needs instruction and curriculum design, progress monitoring, and large-scale assessments. She has been a special education teacher, consultant, administrator, and university professor. Anne Meyer, EdD, a clinical psychologist, is Chief of Education Design and Co-Founder of CAST. Her work focuses on psychological aspects of learning and learning disabilities and the design of multimedia technology for diverse learners. Dr. Meyer is a recipient of a Gold Medal from the National Association of Social Sciences. With her CAST colleagues, she is winner of the Computerworld Smithsonian Award for Innovation for the early literacy software program WiggleWorks. David H. Rose, EdD, a developmental neuropsychologist, is Chief Education Officer and Co-Founder of CAST and has served on the faculty of the Harvard Graduate School of Education for more than 25 years. With his CAST colleagues, Dr. Rose has received numerous awards, including the Computerworld/Smithsonian Award for Innovation in Education and Academia, the Tech Museum of Innovation Award, the LD Access Foundation Innovation Award, and the EdNET HERO Award. In 2004, the George Lucas Educational Foundation's Edutopia magazine named him one of education's Daring Dozen.