Project-based learning is an instructional approach that contextualizes learning by presenting learners with problems to solve or products to develop. For example, learners may research adult education resources in their community and create a handbook to share with other language learners in their program, or they might interview local employers and then create a bar graph mapping the employers, responses to questions about qualities they look for in employees. This digest provides a rationale for using project-based learning with adult English language learners, describes the process, and gives examples of how the staff of an adult English as a second language (ESL) program have used project-based learning with their adult learners at varying levels of English proficiency.