AbstractThe 2017 National Educational Technology Plan asserted that personalized learning and blended learning are key strategies to technology’s transformation of all schools across the country (US Dept. of Education, 2017). While blended learning has been well conceptualized and communicated, personalized learning has been leaving educators feeling confused in concept and action. To help facilitate a common language and understanding for K-12 practitioners and researchers, this special issue dives into the connections between personalized learning and K-12 blended and online learning from conceptualization, to teacher preparation, and into teacher actions. A theme that pops up through the issue is the value of planning time and confidence as influences on teacher reception of the personalized learning movement (Tan & Chong, 2018). Additionally, the authors in this special issue share practices that represent the many roles and environments being impacted by the personalized learning movement, and they call us all to engage in future study of this emergent field.