The EdHub Library is an online teacher professional development platform that serves 250 school districts as part of the Network for Educator Effectiveness in Missouri. It has a collection of more than 300 online activities. This design case describes the efforts of re-developing EdHub due to technical and usability issues of the first generation of the content management platform. The second generation of EdHub was the product of two prototypes and two user testing sessions between January 2018-April 2018. A literature review of information-seeking habits of K-12 teachers and web design and usability standards guided the development of the second generation of EdHub to support teachers' browsing and searching behaviors. Five design decisions support the second generation of EdHub in terms of (1) priority of visual elements, (2) ease of navigation, (3) content alignment with Missouri teacher standards, (4) organization of results in the search engine, and (5) unifying learning objectives, activities, reflection, and external resources.