The Author | Ruth Colvin Clark, Ed.D., a recognized specialist in instructional design and technical training, is the founder of CLARK Training & Consulting. Dr. Clark is a past president of the International Society for Performance Improvement (ISPI), a recipient of the Thomas Gilbert Award for Professional Achievement, and author of six books on instruction and learning including the best-selling e-Learning and the Science of Instruction coauthored with Dr. Richard Mayer.