Dr. Castellanos-Reyes is an Assistant Professor in Learning, Design, and Technology at North Carolina State University. She received her PhD and Master's degrees from Purdue University. She is an educational researcher within the fields of instructional design, online learning, and learning analytics. Her research focuses on supporting online learners' social presence through network analysis. Specifically, Dr. Castellanos-Reyes is interested in how peer-influence shapes learning communities in online learning environments. Her work has been published in The Internet and Higher Education, Computers in Human Behavior, the Journal of Computing in Higher Education, and TechTrends. Her dissertation work won the Mary Kay Sommers Dissertation Award. Her work has been supported by the National Academy of Education, the Spencer Foundation, and the Philanthropic Educational Organization (P.E.O.) and the Frank DeBruicker Graduate Award in Educational Technology. She earned her B.A. in English Philology from the Universidad Nacional de Colombia.