Substantial is a national nonprofit on a mission to unlock the potential of substitute teaching. We use human-centered design to create tools that help districts rethink how they recruit, train and support substitute teachers: -SubSchool: Online PD for subs - online courses, resources and facilitated learning communities. -SubPlans: Streamline the process for creating and managing sub plans, making it easy for schools to provide substitute teachers the information they need to have a successful day. Substantial was incubated at Stanford's dschool and is an alumni of the AT&T Aspire EdTech Accelerator. Substantial is a fiscally sponsored project of Playworks Education Energized (“Playworks”), a California based nonprofit public benefit corporation. Playworks is tax exempt under section 501(c)(3) of the IRS Code and our Federal Tax ID number (FEIN) is 94-3251867.