A hypnotist's first induction technique often involves directing subjects to focus on something they're already doing. "Feel your eyes getting tired" is a good opening, because everybody's eyes feel tired all the time, but we don't notice until someone points it out.
Teachers, like hypnotists, can string along a series of requests by asking students to do something most are already doing, then waiting for 100-percent compliance, and finally issuing another directive, etc. It's better for teachers to say, "Point your eyes toward me" and wait for compliance, instead of saying, "Stop talking, turn around, turn to page 237, take out a pencil, and head your paper with 'Geology Frame.'"
A list of strategies for successful classroom management, Source: https://www.edutopia.org/blog/big-and-small-classroom-management-strategies-todd-finley