Our Spanish program is supplemented by our own textbook, which consists of twelve books.  Each book corresponds to one of our twelve levels and it is based on theoretical explanations and practical exercises.  The first four books correspond to the Beginners level; the second four books are for the Intermediate level, and the last ones correspond to the Advanced level.
In each book the essential grammar discussions are always backed by practice through written and oral exercises.  After each level there is a written and oral evaluation reviewed and corrected by our …