Sum Dog is a cool little website where students can practice math. The free version includes access to a few math games, and a new math game is always valuable in the arsenal of a teacher!
If you choose to use it, enter your students’ first names, then give them all a generic last name. You could go with something like “Smith”, or you could use the name of your school “Blakely” or “Sutherland”. This protects their privacy as no other information will be collected with respect to the students.