TeachersNetwork.org/lessonplans
Contains comprehensive plans organized according to subject matter: arts, classroom management, English/language arts, foreign language, global education, health/physical education, instructional inquiry, mathematics, relations, service learning, science, social studies, special education, and technology. The site indicates grade levels for elementary, middle school, and high school. Readers can also view the most popular teacher-created lesson plans in each subject and grade level.