Best Lavalier Microphones for classrooms

A classroom lavalier gets clipped on and pulled off several times a day by someone whose job is teaching, not audio. It goes in a drawer, comes out flat, gets shared between rooms, and is worn over a different fabric every hour. Cable failure at the connector is the normal way these die, not capsule failure.

So the deciding factors are mechanical. A clip that holds on a lanyard as readily as a lapel, a cable that tolerates being coiled badly, and a connector standard your existing bodypacks already use - because a lavalier that needs a different transmitter is a lavalier that will sit unused.