ah I wish I found this forum when I was student teaching last semester. My worst lesson of the semester just happened to be the day after halloween, when the kids (and me) were all tired from the night before, and of course my supervisor showed up with little warning and knocked the class for "low energy." "I am so FRUSTRATED. I feel like such a failure." my supervisor really made my experience stressful as well, which is too bad as they should be encouraging you instead of knocking you down. Luckily my students always told me I was their favorite teacher, which helped me a lot. I kind of think students ALWAYS like their student teachers the most, but I took whatever support I could get.