Chances are you'll check in both using the "Sign in with ClassLink" choice to register to the two ClassLink and Backpack, or by using the "Check in to Backpack Only" option and getting into your district username/email and password. To inquire what your district email and password are, be sure https://authentic-versace91121.goabroadblog.com/32831656/the-greatest-guide-to-backpack