The concept of "least restrictive environment," as used in the context of a special education discussion, means that a student who has a disability should have the opportunity to be educated with non-disabled peers to the greatest extent possible. This means that they should have access to as much of the general education curriculum, extra-curricular activities, and any other "normal" programs as is feasible.
Four factors are generally considered when determining the LRE for a particular student:
See also http://en.wikipedia.org/wiki/Least_Restrictive_Environment.