We get quite a few of these, so we have developed some methods that work well. I teach Culinary Arts so we have to have them controlled because we give them knives to use! If I have an angry student burst out in class, I sternly ask them to meet with me in private during break or after class. I do not allow them to disrupt class for more than an outburst. When I meet with them I let them vent, and I explain to them that I will help them find a solution. Our student services department has a "counselor" who is trained to deal with these situations, and she has helped us tremendously. So if I feel I can't help the student, I assist them in making an appointment with our "counselor". We have had a drastic reduction in continued anger from these students, even some successful turn-around stories.