We explore the conditions under which short, comparative interrupted time-series (CITS) designs represent valid alternatives to randomized experiments in educational evaluations. To do so, we conduct three within-study comparisons, each of which uses a unique data set to test the validity of the CITS design by comparing its causal estimates to…

With more than 80% of institutions offering online learning options and even more using web technologies to enhance traditional classroom instruction, the learning management system (LMS) is increasingly an indispensable, enterprise-level technology for today's colleges and universities. Naturally, each institution has a unique set of…

The effects of a mathematical problem-solving intervention on students' problem-solving performance and math achievement were measured in a randomized control trial with 1,059 7th-grade students. The intervention, "Solve It!," is a research-based cognitive strategy instructional intervention that was shown to improve the problem-solving…

Learner Verification and Revision (LVR) has been part of Florida's instructional materials adoption process since 1974, when state statutes required textbook publishers to provide written proof that their materials were revised based on student feedback before publication. Publishers were also required to collect student data and make revisions…