Best Headworn Microphones for classrooms

A teaching headset is shared equipment. It moves between staff, sometimes between buildings, and it is worn by people who did not choose it. That makes hygiene and adjustability the deciding factors, ahead of frequency response - a microphone nobody wants to put on is a microphone that stays in the drawer while the lesson gets shouted.

It also has to survive being stuffed into a bag between periods. Look for a boom that holds its shape rather than a wire that gradually stops returning, and windscreens cheap enough to replace per teacher rather than per device.