Shopping will be unavailable through Monday, July 14 due to scheduled maintenance. To place an order, call HMH Customer Service at 800.225.5425.

Dr Danielle Leong

Dr. Danielle Leong

OD, PhD

Dr. Danielle Leong is the Chief Scientific Officer at King-Devick technologies, inc. focusing on vision and eye movement related research in education and its impact on early reading and academic performance.