Yeah, I especially hate it on the first day of school when the teacher makes you introduce yourself by announcing random things about yourself to the class like "What's your favorite food?" or "What's your favorite color" and other nonsense like that. Every Monday, my Government teacher makes us share what we did over the weekend to the class. Usually she picks volunteers but she also looks at people who rarely participate in class (i.e. people like me) and picks on us.
I really feel like most teachers enjoy seeing shy students like me get all flustered. It's really aggravating. I especially hate how when you feel all eyes on you, you struggle with your words and forget what you're going to say. That's what happened to me the last time, and I nearly passed out from the anxiety.