The term "talent development" has historically been associated only with gifted education in the K12 education world. But for the past 30 years, husband and wife team Joseph Renzulli and Sally Reis have been steadily increasing the pool of educators trained to apply talent development practices to mainstream instruction through the Renzulli Learning Schoolwide Enrichment Model (SEM). The Renzulli SEM is a subscription-based software solution designed to enhance the core curriculum in K12 schools by offering tailored learning opportunities to augment students' regular schedules on a daily, weekly or as-needed basis. At the core of the SEM is a computer-generated profile that identifies individual student interests, learning styles and expression styles and then automatically matches them with specific activities and assessments from a database of more than 25,000 secure and vetted Web-based and offline resources. It is this deep level of differentiation, which goes beyond simple skill-level differentiation, that makes the Renzulli model unique within the current personalized learning movement, and different from competitors in the education reform world. Personalized learning pioneers say student interest and engagement reveal hidden potentials that are key to achievement. [For part I, see EJ969973.]