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…

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…