One Day, Every Day: The Heart of a Substitute Teacher is a heartfelt, practical, and inspiring guide for anyone stepping into the dynamic world of substitute teaching. Drawing from real classroom experiences, author Sana Munir, an experienced educator and curriculum designer, offers actionable advice, personal stories, and uplifting encouragement for those navigating the unpredictable but deeply rewarding role of a substitute. From preschool to high school, this book covers strategies for building rapport quickly, managing classrooms with confidence, and turning even the most unstructured days into meaningful learning experiences. Whether you're a new sub, a seasoned educator considering flexible work, or someone exploring a path in education, this guide provides a toolkit of insights and support. More than a manual, One Day, Every Day celebrates the resilience, creativity, and quiet impact of substitute teachers, the unsung heroes who make a difference, one classroom at a time.