Pop Quiz lets a teacher upload past exam papers, review the multiple-choice questions and answer keys extracted from them, and assign quizzes built from those questions to their own class. Students answer those quizzes and see their results.
A teacher account is created by signing in with a Google account. A student account is created by registering with a school email, gated either by an approved email domain or by a teacher's synced Classroom roster.
A paper a teacher uploads joins one shared library usable by every other teacher in the app, not just the one who uploaded it. A teacher may remove their own contributed paper from the shared library; existing quizzes already built from it keep working.