Mindfulness is the practice of cultivating attention to foster greater self-awareness and self-knowledge about thoughts, feelings, and sensations, and how they can affect one's actions. It is complementary to other Social and Emotional Learning (SEL) approaches related to positive learning outcomes for pre-K-12 students and educators. This Center to Improve Social and Emotional Learning and School Safety brief: (1) introduces mindfulness as a strategy for facilitating social and emotional learning in school; (2) explains the potential benefits for both students and educators; (3) provides examples of mindfulness strategies; and (4) lists resources for learning more about mindfulness. [This report was produced by the Center to Improve Social and Emotional Learning and School Safety at WestEd.]