Greentree School opened its doors in 1976. It was built to accommodate 630 students. The building has five classroom clusters each containing four classrooms, as well as four portable classrooms. Our teachers have an outstanding reputation for providing a strong academic program with emphasis on high student achievement. We use flexible grouping of students to match learning tasks to students’ needs. Responsibility adds to the quality of our program. Our staff is committed to providing an enriched and positive learning environment for children. We follow a traditional school calendar as part of the Irvine Unified School District.