The proposed web-based system, inspired by the educational
approaches constructivism and self-directed learning, In spite of
traditional approaches, leaves it up to users evaluating and making
judgments of what effective writing means in a given situation,
according to a number of suggested alternatives and the outcomes
obtained in previous correspondence. A case-based reasoner suggests
a number of ad hoc templates that the user has the chance
to adapt to particular contexts and saves them into user-defined
case libraries. By means of this original structure of knowledge
and a case-based reasoner, the system is able to select the most
appropriate cases for the letter-writing assignment undertaken
by the user.