such as number of posts, frequencies of the events and time spent could identify activities that are related to higher or lower marks (Romero et al., 2008; Romero-Zaldivar et al., 2012; Shih, Koedinger & Scheines, 2008)
such as number ofposts, frequencies of the events and time spentcould identify activities that are relatedto higher or lower marks (Romero et al.,2008; Romero-Zaldivar et al., 2012; Shih,Koedinger & Scheines, 2008)