Adult English as a second language (ESL) educators have struggled to move beyond skills-based instruction to implement more student-centered, contextualized pedagogy that prepares students to become active citizens and to solve real-world problems, even as the growing number of immigrants make adult education increasingly important for determining…

When validating assessment models built with data mining, generalization is typically tested at the student-level, where models are tested on new students. This approach, though, may fail to find cases where model performance suffers if other aspects of those cases relevant to prediction are not well represented. We explore this here by testing if…