I've got a bachelor's in CS, and teaching certificates in both mathematics and "computer information systems", which was what the CS certificate was called 15 y

I've got a bachelor's in CS, and teaching certificates in both mathematics and "computer information systems", which was what the CS certificate was called 15 years ago. There is now a teaching certificate in just "Computer Science", although it wasn't offered in Texas for a few years while they were switching from one to the other. Other states vary widely, I'm sure.