Bed bugs are essentially hitchhikers. Once you're in a hotel room or rental home that's infested, they latch on to your clothes and/or belongings and end up wherever you do.
Deptford High School is open today, even though there have been reports of bed bugs on their campus.
Kids are only going to take the pests home with them if they catch them at school. My suggestion is close the school and solve the problem...