Hello everyone! I'm koro sensei! (Aka, the one who blew up the moon) I'm usually on here after I'm done grading the students assignments and whatnot. I actually got this account because Karma-kun said I should start using the Internet. I'm not quite sure why, but it doesn't seem like a bad idea to me! 
Don't feel afraid to ask me questions or anything! Your Sensei is always open to chat!