The document discusses three generations of online learning pedagogy:
1) Instructivist pedagogy focuses on transmitting knowledge through one-way instruction and is scalable but limits interaction.
2) Social constructivist pedagogy emphasizes collaboration and community through small group work but is not scalable.
3) Connectivist pedagogy is learner-driven and focuses on building networks, but requires high digital literacy and an open approach.
Overall, the document argues that effective online learning should incorporate elements of all three pedagogies to meet varied student needs.