life, apparently

Twice I've displayed my password to my entire 100 student class. The room has major technical problems and was apparently designed by someone with the same level of computer savvy as my cat. To see the computer monitor, the big projection screen has to be on (don't know why since there is a perfectly nice desktop screen that also displays the desktop information but not until the projection screen is on. This means I have to enter my username and password while projected on the big screen. Well, I'm not very good at this apparently and so twice in the past 4 weeks I've displayed my password to everyone (entered it in username rather than password). I only have a total of 3 passwords that I rotate through and now I've had to invent a 4th which I'll probably give out next week anyway (IF I remember it that long).