The document discusses the Discourse Theory of second language acquisition. Some key points:
1. The Discourse Theory views language development as occurring through participation in communication. Learners discover language meanings through interaction, not just exposure.
2. Both first and second language are acquired through communication. The process is similar for both, with learners constructing sentences from examples in discourse.
3. According to the theory, the linguistic environment shaped jointly by the learner and native speaker influences the order and speed of second language acquisition. Grammar is acquired based on frequency of structures in input.