Abstracted Replay - when a coach videotapes your whole action but focuses on a specific point and compares it to how experts do it. Spatial Reification - the trajectory of the points mentioned above. Abstractions can be made. Comparison of the processes critical to the expert versus the novice. Students can build and test theories.
Students can explain their theories to other students.
Making knowledge which is not spoken clearly defined. Making knowledge available to be used in other tasks. Comparing strategies to different contexts. Makes the student see the problem from another student's point of view. The student learns to set a goal which is achievable.