From: A multi-layer map-oriented resource organization system for web-based self-directed learning combined with community-based learning
Phase 1
Phase 2
Participant 1, 5, 9, 13
ROS(E-learning)
IE(PE)
Participant 2, 6, 10, 14
ROS(PE)
IE(E-learning)
Participant 3, 7, 11, 15
Participant 4, 8, 12, 16