The Tema a tema educational book series by Edelsa consists of two volumes and is aimed at students of two levels, B1 and B2. It is a complete series of lessons focused on dialogue and interaction.

Through 12 units that capture the student's interest and curiosity while providing various information about the Spanish-speaking world, the student will be called upon to participate in various activities and exercises that involve acquiring communication skills. Students are required to work on all the elements necessary for their level (grammar, vocabulary, etc.).

The linguistic elements (auditory or written) are analyzed in comparison to reality, which enhances realism in learning and promotes better progress for the student.

The type of activities and exercises and their analysis vary from unit to unit, making each day in the student's class a surprise.