Casey,

I can not give you a brand name, but one thing teachers might want to consider is if they would be well served by a noise canceling headphone.  

I use independent contractors to answer my business phone from their homes.  We purchase noise canceling headsets that make it so the other party does not hear such things as dogs barking and children talking in the background. They tend to be far more expensive than normal headsets-- the type that I have to purchase to work the best with my particular phone system cost more than $100.  But for some people with a lot of noise in their work environment, I think it is money well spent.