Has anyone had their students (high school and beyond) put expositions of math problems/topics/projects on a class blog to be critiqued by other students and revised on-the-fly to provide some interactive feedback and social incentive/synergy?
If so, what are your assessments of the pros and cons of such a project?
(For example, for students at the appropriate level of undergraduate education, an exposition of the Dirac delta function and its applications could be a potentially interesting and rewarding exercise.)