How do I know if my school is a red flag?

Just gradated, certified in special education.<br><br>I have been applying to teaching jobs in my area and have gotten a few interviews. However, I’m not sure if I’m reading too much into the interviews or if I should throw in the towel and get a new interview. How do I know if a school is a red flag? I feel like I’m overthinking it and I’m not sure I know what to look out for.<br><br>TL:DR I got a few interviews, what should I look out for during the interview that would be a red flag?