Although inclusion has provided access to the general education classroom for students with disabilities, there are significant questions about whether these students have gained full access to the curriculum. To design curricula for diverse learners, designers must have a clear picture of the obstacles and barriers that some students encounter. This article describes a design process that was used to create a web-based tool that allows teachers to created tiered web-based curricula for their classroom without any programming knowledge. The goal is to allow educators to quickly and easily develop digital instructional materials that are simultaneously accessible, flexible, and engaging for diverse learners such that supports are embedded into the curriculum for all students to use as needed. This article describes the steps, and missteps, along an instructional design journey.