Moodle is an open source learning management system (LMS) used by San Diego Unified School District for more than three years to deliver online courses and to supplement traditional face-to-face courses. Moodle is an Open Source, web-based, software package designed using sound pedagogical principles to help educators create effective online, constructivist, learning communities. Moodle is currently used by more than 1,000 teachers and 55,000 students.