The behavioral approach states that language is taught by the environment by processes of modeling and reinforcement.
Behavioral interventions are direct and systematic.
Weak areas of language are identified and activities are prepared to work on those skills. As students use the skills correctly the teacher reinforces the behaviors. The nativist approach beleives that language abilities are genetic and that the ability to understand language is programed into their brains. Nativistic interventions emphasize the value of discovery learning. One of the tools that nativists use is called expansion.