Professional development for teachers must evolve to provide a personalized approach to better meet the needs of the individual. Micro-credentialing is one way to provide teachers with personalized professional development. This case study explores the implementation of a micro-credentialing course in one school district. The district selected a company that provides micro-credential courses nationwide. The theoretical framework for the study is Andragogy, the theory of adult learning (Knowles, 1984). The objective of the study is to determine to what extent micro-credentialing meets the needs of teachers, and to what extent it is effective professional development. Data for this qualitative study was collected through teacher surveys and interviews. A district administrator and a company representative were also interviewed. Analysis of the surveys and interviews revealed teachers found value in the course, they also shared suggestions for improvement. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]