A Classroom Innovation Challenge is an opportunity for your students to solve a problem that exists in your school or community. This Playbook s designed to support the process of applying design thinking and innovation methods to this challenge. There are lots of pathways that will lead students to design and test workable solutions to the problem, but this is a reasonable set of "plays" that will get results. The steps in this playbook follow the Innovation Box process (www.edinnovationbox.com), which is a process specifically designed for teachers and students to solve real-world problems based on ideas from Lean Start-Up, improvement science, and design thinking. This Playbook is specifically designed for young students (K-5) to use design thinking and other innovation tools to come up with a solution to get students o wash their hands more and prevent the spread of coronavirus (COVID-19).