Your teaching style is great. I have no complains about anything. There is one improve that I would recommend; The DLPT supplementary work.
The DLPT prep questions are a wonderful tool as well, even if just for 1 hour a day. It allows us to not only practice Farsi, but dive deeper into preparing for the DLPT specifically. My improve would be to allow other classes the opportunity to choose if they would like to do the DLPT prep.