This document summarizes a study on student engagement in online learning. The study examined how student reflexivity and high-impact practices influence engagement for online master's students. Through interviews and discussion board analysis of 22 students in public health, management, and computer science programs, the study found: 1) Learning environments can trigger rich student reflexivity; 2) High-impact practices expect communicative and co-reflexivity to progress mutual understanding; 3) Student engagement is influenced by task-related habits, social relations, and beliefs/dispositions. The study implications are to analyze student reflexivity profiles in program design and assist students in exercising unfamiliar reflexive modes to support learning in an uncertain knowledge society.