model construction (WLEM). The target group consisted of 100 students, Faculty of
Education, Khon Kean University. The research procedures were as followings: 1) to
examine the principles and theories regarding constructivism, cognitivism, mental model,
and web-based learning, 2) to synthesize designing framework of WLEM, 3) to design and
development WLEM, and 4) to investigate learners' perceptions toward a WLEM, The result …