وعليكم السلام ورحمة الله وبركاته
This PDF file includes all theories about second language acquisition
http://www.veramenezes.com/slatheory.pdf
such as
Behaviorism
Acculturation
Universal grammar hypothesis
etc
..............................
also have a look at this site
http://chris1066.tripod.com/theories.html
:)
المفضلات