Least Restrictive Environment = Educational Placement.
Inclusion = Educational Outcome.

In the late 1980s and more energetically in the 1990s, the term "inclusion" came to be recognized as the desired approach to education. Inclusion more accurately embraced the full meaning of IDEA 1997 compared to "integration", and certainly more than "mainstreaming". The literature exploded with books and definitions that identified a more powerful perspective.

Another term for education which is inclusive is supported education, meaning one educational system for all students. Successful schools regard all students as rightful members of the school they would attend, and the class(es) in which they would participate if they did not have disabilities. Each student is provided instructional curricula to meet their individual needs and learning styles.

Individual in a group
Photo courtesy William Bronston, M.D.