It would be great if you could help your son or daughter to get set up in Quizlet. This is a great website that allows students to use flashcards to revise, but also lets us do live quizzing together in class to help memorise information.
This video explains how to get set up on the quizlet.com website. Your son or daughter will need your help as, due to their age, they will need your email address so that you can approve their account.
Thanks for your support.