Notebook is a good thing I just recently started using italki. This is my first time to have online lessons. I realized that these lessons are less intimate then real classes. I mean after a real life lessons, I have some chit chat with the teacher or the students. We mention weekend, homework and plans for the next lesson. This is missing on italki. At the end of the lesson we just say goodbye to each other and hang-up Skype. This is understandable because if you book a single lesson nobody knows if there will be another lesson or not. Also you don't have that long history with the teacher. But hopefully this will change! So I think that these notebook entities help a lot. I use it to summarize my lessons, to wind down, to think back on the last one hour's experiences.