This document discusses the concepts of normalization, mainstreaming, integration, and inclusion as they relate to educating students with disabilities. Normalization aims to make the environment as close to normal as possible for exceptional children. Mainstreaming involves placing disabled students in general education classes after demonstrating ability to keep up. Integration justifies including disabled students to limit infrastructure, underestimation, need for social integration, and expense. Inclusion focuses on recognizing differences, supporting all learners and the system, and overcoming barriers to meeting full learning needs.