Item Response Theory (IRT) is a ubiquitous model for understanding humans based on their responses to questions, used in fields as diverse as education, medicine and psychology. Large modern datasets offer opportunities to capture more nuances in human behavior, potentially improving test scoring and better informing public policy. Yet larger…

The purpose of the study was to examine four questions concerning English Language Learners (ELLs). First, does English Language Learner status impact math scores? Second, does immigrant status favorably contribute to math achievement? Third, what math achievement is possible in other countries where there is multilingualism or high immigrant…