Wearables, such as smart watches for fitness and virtual reality sets for entertainment, are technological innovations transforming everyday life and offer benefits for education. This study presents a systematic review of the literature on wearable technology in the field of education. The review identifies and critically analyses 115 peer-reviewed publications between 1999 and 2019. The review captures research methodologies, theories, wearable technology types, and applications, and contributions of the studies in the context of education. The review then analyzes different research foci for educational research and loci for technological innovation. Using insights from the review process, this study concludes by discussing theoretical foundations and outlining directions for future research.