This study reports part of a larger study that explores three technologies--Padlet, video-embedded quizzes and Google docs and their effectiveness for enhancing pre-service teachers' (PSTs) learning engagement in online mathematics education. The data reported in this study are a survey, learning analytics and observation data. We found that Padlet heightened PSTs' social and collaborative engagement, and these dimensions were further enhanced in Google Docs activities. PST's cognitive engagement was enhanced through adding quizzes based on lecture videos. This study contributes to selecting relevant technologies to enhance PSTs' engagement in online learning in general and in mathematics education more specifically.