Omg yes. First externship I was placed with a supervisor that was just the worst human being on the planet. She required a lesson plan for each child every day I would be with her, which I thought was a bit much but within normalcy. But it became super difficult when I realized she wouldn't let me use her materials. I essentially stayed up every night until almost 4am making materials (because I couldn't buy them...broke grad student) and then making lesson plans to go with them. Then when I would submit them, she would correct them and make me redo them if I put "he" instead of "she" (things I would normally catch, but at 4am my brain stopped functioning.) Worst part of it was that every time she intervened to help out with a difficult kid, she would dock my minutes. One session, my student was crying and sliding out of his chair. As this was happening she was yelling at me to get materials out FASTER, FASTER and then screamed "YOU LOST HIM." I was docked 15 minutes of my session and I had to hold in all my emotion to secure a passing grade. Constantly belittling me, condescending me. The last day of my placement when she gave me my grade, I got an "A" which confused the F out of me. I asked her if she submit this to my supervisors (who were already aware of the situation) and she said yes. She tried to talk to me more but I had it and walked out of the school. Never spoke to her again. The amount of anxiety and depression she caused me to have almost made me drop out of the program. Even worse...I got 75% of the hours I was supposed to get during that externship and I had to have 2 placements the next semester to make up for it. F*ck her and anyone who thinks they can treat grad students (or anyone!) like that. I can't wait to be a supervisor and actually help students!