What are the benefits of using data in education?

Prof. Demetrios Sampson explains that data should serve both students and teachers. For students, it should improve students' control over their own learning to ultimately foster their self-regulation as lifelong learners. For educators, data should help them understand their students' learning better and become more informed, reflective practitioners. 
Demetrios Sampson is a Professor of Learning Technologies at the Department of Digital Systems, University of Piraeus, Greece and an Adjunct Professor at the School of Education, Curtin University, Australia. Demetrios has co-authored several books on educational data literacy. Demetrios is engaged in teaching and research in the field of Learning Technologies and Digital Learning since 1996. He has also developed the first MOOC on the use of Educational Data Analytics by School Teachers, offered by the edX platform which has attracted more than 20.000 participants from 180 countries since October 2016. He is the recipient of the IEEE Computer Society Distinguished Service Award (July 2012) and named a Golden Core Member of IEEE Computer Society in recognition of his contribution to the field of Learning Technologies. He is also the recipient of the Golden Nikola Tesla Chain Award of the International Society for Engineering Pedagogy (IGIP) for "International outstanding achievements in the field of Engineering Pedagogy" (September 2018).