(1) Mary Thorpe discusses conceptualizations of online interaction and challenges of designing effective online learning activities.
(2) She provides an example course where online interaction is well-integrated and successful - students collaborate online through structured activities tied to assessment.
(3) Key factors in the design include identifying students with specific roles, authentic tasks, and ensuring participation without depending on tutors' moderation skills. When online interaction is well-conceived and designed, it can be highly effective for learning.