A multimedia construct for learning based on the Theory of Transactional Distance has been developed consisting of four stages of decreasing transactional distance. This model has been applied in various teaching and learning contexts, on- and off-line, and its validation was investigated. Results confirmed in practice the four distinct sequential stages. Difficulties were discovered in navigating through the collaborative second and third stages, consistent with findings from related studies on acquiring critical thinking skills. Specific areas for attention were identified to promote learning using multimedia.