THIS EDITED COLLECTION BY SOM NAIDU MAKES A SIGNIFICANT CONTRIBUTION TO MEETING THE CHALLENGE FACING US. SOM HAS NOT ONLY ASSEMBLED AN INTERNATIONAL TEAM WITH CONSIDERABLE EXPERIENCE, BUT HAS SUCCEEDED IN FOCUSING THEIR ENERGY AND EXPERTISE ON THE CORE LEARNING AND TEACHING ISSUES THAT CONFRONT THOSE WHO ARE ATTEMPTING TO ADDRESS THIS CHALLENGE (IE, SUBJECT MATTER REPRESENTATION, ACTIVATION OF LEARNING, SUPPORTING INTERACTION AND SOCIALIZATION, ASSESSING LEARNING OUTCOMES AND PROVIDING FEEDBACK).