My advice is to do what is best for your birds, which in my
opinion is NOT to take them to your class. If nothing else it
will probably scare and stress your birds to be out of their
usual environment with a lot of loud people around them. And you
are also risking injury to your birds especially if you choose
to take them out of their cages. If your schoolmates need to see
parakeets, they can see them at any pet shop.