“…Nadolski et al have used simulators to test personalized recommendation algorithms for lifelong learners and self-organized learning networks, to match learners with learning actions (similar to our Learning Nuggets) (Nadolski, et al, 2009). Other researchers have also investigated recommendation algorithms using collaborative filtering, preference-based, neighbor-interest-based, and other data mining techniques (Recker, Walker, & Lawless, 2003;Romero, Ventura, Delgado, & De Bra, 2007); Tsai, Chiu, Lee, & Wang, (Recker, Walker, & Lawless, 2003;Romero, Ventura, Delgado, & De Bra, 2007;Tsai, Chiu, Lee, & Wang, 2006). The Nugget recommendation algorithm identifies and ranks the best Nuggets for a learner that will help her master the topic in the most efficient way possible (i.e.…”