It's the HUD Good Neighbor program that most people are familiar with. These aren't individuals selling homes but rather the government. They are discounted by 50% in return for the participants living in the homes for 3 years. Teachers must serve students in the area where the home is listed.
Most of the homes in our area are not in areas where you would want to teach.
https://www.hud.gov/program_offices/...goodn/gnndabot
Are you planning on selling your home at a 50% discount? That's really kind of you. Put a notice up at a local school or police station after you have it appraised for FMV. I'm sure you'd have a teacher's or police officer's gratitude.