Classroom physical activity is implemented at the classroom level and depends on the support that teachers receive from school administrators, as well as their own buy-in and comfort level. Each classroom is unique, and one prescribed plan for classroom physical activity will not work in all classrooms. Therefore, "Integrate Classroom Physical Activity in Schools: A Guide for Putting Strategies Into Practice" provides questions for consideration, key activities, and additional resources, including tools and templates, that teachers and physical activity champions can use to adopt, promote, enhance, and sustain physical activity in the classroom. The primary audiences for this document include teachers and other classroom staff, physical educators, school administrators, teacher education programs, and state and school district leaders who provide technical assistance and professional development on classroom physical activity. This document can also be used by any physical activity champion within or beyond the school who is interested in promoting and implementing classroom physical activity in schools. This guide is a companion document to "Strategies for Classroom Physical Activity in Schools" (ED593247). [The writing team for this report includes: Brittany H. Chen, Mary Juergens, Kelly Hughes, Lina Jew, Kate Holmes, and Shannon L. Michael. This document was prepared in collaboration with Springboard to Active Schools, an initiative of the National Network of Public Health Institutes (NNPHI) and Health Resources in Action (HRiA) through a cooperative agreement.]