How can I stop my eyes from watering when I'm nervous?

whenever I'm in class and a teacher picks on me and I don't know the answer my eyes start to water and it looks like I'm crying it also happens when I'm even just talking to a teacher about something I do know. It is really annoying because people start to think that I'm a cry baby because of how much my eyes water. Is there any way to stop them from watering so much?
Asked Aug 22, 2015

TIP: If it's not your answer to this question, please click "Leave a Comment" button under the question to communicate with the question owner.