mainstreaming in British English
 (ˈmeɪnstriːmɪŋ)
noun US
1. 
the act of placing a pupil with additional support needs into a class for those without additional support needs
2. 
the act of incorporating a social group, etc, into the mainstream
 the mainstreaming of gay America
 A lot of BNP members are very unsatisfied with the mainstreaming of the party.