Abstract
In the history of self-learning, a lot of mechanisms have been proposed and used. "e-learning" has been attracted because it has a possibility to support a self-learning by the use of computer systems. Also "e-learning" does not restrict both time and place of the learner. However, it has been revealed that "e-learning" alone does not keep the motivation of learners. (exceptions: those who can maintain their motivation by themselves.) In order to keep the motivation of learners, we have developed the several PSEs by the use of TIES (= Tezukayama Internet Educational Service) in which both e-learning and e-teaching are available.
