“…Since emerging in both social networks and the world's largest wiki, the Wikipedia online encyclopedia [7], small world networks are a promising structure for representing educational knowledge. Methods developed to model and explore knowledge in the Wikipedia give inspiration for developing pedagogically motivated knowledge repositories based on resembling wiki frameworks to support collaboratively various personalized learning tasks [8]. Having over 3 million articles in English, more than concepts in a typical human vocabulary [9], the full content of Wikipedia cannot be effectively evaluated all the time [10] and thus it seems reasonable to generate guidance for exploration by evaluating only few steps further in the knowledge network.…”