Over the past decade, but especially in the past few years, programs with a "promise" label have been advanced at the local, state, and federal levels. To advance understanding of the design, implementation, and impact of the many different versions of emerging programs, policymakers, practitioners, and researchers need an organizing…

Carroll's learning model accounts for variations in school learning with variables, which can be expressed in terms of time and achievement. Most aspects of the model have been confirmed. Ways that the model might be used to address current problems in education are considered. (Author/BJV)