**ARI-LAB 2** is an open multi-environment
system for developing skills in solution to arithmetical
problems for children of the primary and the lower secondary
school.

**ARI-LAB 2** addresses two kinds of users:
the teacher and the pupil. By interacting with **ARI-LAB
2**, the pupil can build his own solution to some
arithmetical problems, by interacting with a structured
and interconnected set of environments of different kind.

These environment include:

Apart from the previous environments, the teacher has
also at his/her disposal an environment for planning and
customizing the educational activity with his/her students:
writing problem texts, constructing problem solutions,
examining and commenting the students’ work, configuring
the system for every student of his/her class.

In **ARI-LAB 2** it is integrated a vocal
synthesizer for developing and validating the basic mathematical
skills (such as the counting, the coordination between
the oral and written representation and that in digits
of a number, the numerical equivalence, etc). There are
also some movies in Italian for deaf-and-dumb to adapt
the system to the specific demands of the deaf children.
The interface of **ARI-LAB 2** is currently
available in three languages of the European Community:
Italian, English, and Spanish.