eLearn Magazine: In-Depth Tutorials
"One possibility is a system of hierarchical peer-reviewed group assignments developed by David Hanson and Troy Wolfskill (Borman & Washington, 2003; Wolfskill, 1998) as an online component in face-to-face chemistry courses. For problem-solving assignments with multiple solutions, students are put into groups of five. Once every student in the group submits a possible solution, the group then discusses and selects the best one, finally submitting it to the whole class. The online environment is "hard-wired" so no student can participate in the group discussion without first submitting an individual assignment. Once every group has submitted their solution, the whole class, including instructor, discusses the group solutions and selects several as outstanding."
a possible solution.