The design and development of the dragoon intelligent tutoring system for model construction: lessons learned

This paper describes Dragoon, a simple intelligent tutoring system which teaches the construction of models of dynamic systems. Modelling is one of seven practices dictated in two new sets of educational standards in the U.S.A., and Dragoon is one of the first systems for teaching model construction for dynamic systems. Dragoon can be classified as a step-based tutoring system that uses example-tracing, an explicit pedagogical policy and an open learner model. Dragoon can also be used for computer-supported collaborative learning, and provides tools for classroom orchestration. This paper describes the features, user interfaces, and architecture of Dragoon; compares and contrasts Dragoon with other intelligent tutoring systems; and presents a brief overview of formative and summative evaluations of Dragoon in both high school and college classes. Of four summative evaluations, three found that students who used Dragoon learned more about the target system than students who did equivalent work without Dragoon.     

Can “Some College” Help Reduce Future Earnings Inequality?

This article addresses the policy debate over “college for all” versus “college for some” in the United States and analyzes the relationship between “some college” (as a formal education attainment category) and earnings. Our evidence confirms—using data from the American Community Survey (ACS), the Panel Study on Income Dynamics (PSID), and the Survey on Income and Program Participation (SIPP)—that more (postsecondary) education, on average, is associated with higher median earnings. However, there is emerging evidence that a proportion of workers who have attained lower levels of education (i.e., “some college”) earn more than those who have attained higher levels of education (bachelor's degree).

We focus particular attention on the subset of Americans who fall into the U.S. Census official category entitled “some college.” This is a heterogeneous group who have alternate educational credentials but who have not acquired a formal associate or bachelor's degree. Instead of an unequivocal focus on “college for all” or even “community college for all,” we argue that educators and policymakers should consider “some college” as a viable pathway to future labor market success. In sum, we conclude that some types of “some college” could lead to a reduction in earnings inequality.