With this contribution we want to present and explain the demonstrators of the
»Technology Enhanced Textbook« (TET) that we developed during the last two
years and discuss with the active PLE-community whether TET could be a useful
component of a personal learning environment. Instead of using the term PLE to
refer to the tool itself we prefer to use it to refer to the whole physical
and virtual environment which can be influenced and designed by the learner.