Classroom iPad Mirroring

Hello! I am a specials teacher with 1to1 student iPads for my classroom. I have 7 different classes and a classroom set of iPads. I am looking for a simple way to mirror my teacher iPad or Mac computer screen (either will work for my purposes) to my classroom iPads at the same time. In the ideal world this wouldn’t require a sign in from the students each time and would override whatever was happening on the students screens (a one time initial sign in is not an issue). In a classroom, more steps for the students equals instruction time lost and time required to help struggling students “login” or get to the correct screen. Is this possible? Are there any apps that would accomplish this? Thank you.

-Megan