how to make configurator not change the lock screen

i manage about 300 ipad mini's for a school district and i use apple configurator once a month to manually update the ios and apps on the ipads. i have a grade level that uses pictures of the kids for the lock screen to identify whose ipad is whose. the issue is when i plug them into configurator to update them it always resets this lock screen, how can i make it so that the lock screen is not effected? All of my ipads are supervised, and i do not have the option of removing the supervision from that grade level.