This presentation features the instructional design of a blended learning online course on formative assessment developed at the request of the Philippine Department of Education (DepEd), under the USAID/Philippines All Children Reading task order. In 2020, DepEd, through the National Educators Academy of the Philippines (NEAP), issued a policy aimed at strengthening the quality of TPD. The policy calls for several transformations, including the use of a wider range of learning modalities, such as job-based learning and teacher communities of practice; the adoption of a wider range of delivery platforms, such as online and blended learning; and the immediate application of TPD lessons in classrooms. The adoption of the policy has been slow and there are few exemplars of approved courses that meet these requirements. The challenge was to design a learning experience for teachers that not only exemplified these requirements but was also flexible enough to adapt to the myriad school contexts in the Philippines and was ready to be taken to scale by regional DepEd offices―without donor support―before the closeout of USAID funding for this activity.