Some of the functions for this course are. - Prohibition. - Give orders in negative. - Express the cause and effect. - Imposible conditions in the past. - Express fear, threat and regret. - Judge. - Give instructions. - Talk about changes and transformations. - Contrast reality. - Talk about a given topic, do research on your own. - Improving and adding other functions from other courses in a more complex way: wishes, descriptions, expressions, doubt, etc. 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.