This text is a companion to the 8-week online Lean Six Sigma Green Belt course developed by University Training Partners. The course covers the five phases of a Six sigma project: Define, Measure, Analyze, Improve and Control, in depth. In addition, it introduces students to a broad range of leadership, project management, graphical, statistical and lean tools vital for leading successful Six Sigma projects. The text as well as the course companion spreadsheet will be the primary references needed for the course exams.