The student's book contains 27 units in total, which are clearly structured into 3 sections as follows: 'Empezamos', 'Avanzamos' and 'Ampliamos'.
Beginner students can expect to progress to level B1 of the CEFR upon completion of the course.
The first 15 units correspond to CEFR levels A1 and A2 and contain 4 pages each. The next 12 units (16-27) correspond to level B1 of the CEFR and contain 6 pages each as the reading and listening exercises are more extensive.
For units corresponding to levels A1 and A2, there is a revision unit (including a self-assessment page) after every 4 units, which enables students to test their knowledge of the content covered. For units corresponding to level B1, there is a self-assessment section at the end of every unit.