Abstract: In automatic reading tutoring, tracking is the process of automatically following a reader through a given target text. This study examined clinical as well as systemic immunological and local microbiological features in healthy controls and patients with different forms of periodontitis. Sequences. In M. Pechenizkiy, T. Calders, C. Conati, S. Ventura, C. Romero, & J. Stamper (Eds.), Proceedings of the 4th International Conference on Educational Data Mining (pp. 169-178). Eindhoven, Netherlands.