Some functions related to this course are: - Express time in general, how long you've been doing something. - Express ideology. - Make guesses and predictions. - Express probability in the present and in the past. - Express future actions. - Express impersonality. - Suggestions and advices. - Express moods: sadness, happiness, angriness, surprise, etc. - Temporary relationships with "cuando" (when) - Tell what others told us. - Give orders. etc. This is how I do it with the lessons. I don't put numbers to them. I consider you've finished this level when you can go through all these functions. For some students it might take more lessons and less for others, a longer or a shorter period of time. The important thing is not to turn pages or "number" of lessons, but learning. So, for the purposes of booking lessons, I only have one lesson per course uploaded, that you'll book again and again, no matter what topic or function we study in each next lesson.