The distinction between what we can say and what we do say

Being give the rule or getting the rule from the examples

Cognitivism

All languages have common features

The distinction between significance and value

Behaviourism

The learner's current ability

The distinction between unconscious picking up and conscious language study

Scaffolding

Competence vs. Performance

Universal grammar

ZPD

Stimulus - Response theory

Interlanguage

Deductive vs. Inductive processing

Acquisition vs. Learning

Constructing an internal grammar

Use vs. Usage