This resource would be a useful poster to put up on the classroom walls. It gives students tips on what sort of things would help create a strong password, and what would not be a good password in order to keep students safe online. The website itself teaches students and teachers about what they need to know about passwords, providing strong advice.  

LINK: https://www.theedublogger.com/updated-password-advice-what-teachers-and-students-need-to-know/