Lesson study is a professional-development process in which teachers collaboratively plan, execute, observe, and discuss lessons in the classroom. Lesson study can be implemented in a college environment to develop and improve the teaching skills of both new and experienced faculty. Focusing on a single lesson allows the lesson study participants to conduct an in-depth investigation of teaching and learning issues and can produce a lively exchange of ideas about teaching and learning among faculty, graduate students, and undergraduate students in a nonevaluative setting.