This activity is designed to help your students memorize their passwords. I have included bingo cards for passwords with 4, 5, 6, 7, 8, and 9 characters as well as calling cards (numbers, letters, and blanks for misc. characters).
Print out the desired cards, fill in your student's name and password, and play blackout bingo as a class or small group. These can be laminated and used again and again.
I also have students use magnetic letters (or loose keys from old keyboards!) to build their password using their bingo card.