The document discusses different generations of distance learning pedagogies and how they align with different structures. The first generation used instructivist pedagogies focused on individual learning. The technologies of this generation included CAI, textbooks, and one-way broadcasts. The second generation used social constructivist pedagogies centered around groups and collaboration. However, groups have limitations in terms of openness, scale, and preparation for lifelong learning. The document then examines how different structures like groups, networks, and collectives relate to different levels of freedom and control in learning.