British RE Teacher Looking to get a job in the USA? Any Help? Advice?

The USA is presently downsizing its schools. Thousands of public schoolteachers have been made redundant. Catholic schools are doing the same. The US is importing math and science teachers. Many schools hire substitute teachers who don't have full credentials. Your best chance at a job is to make direct inquiries at schools. Inquire at your local school and learn if they have foreign partners. If you have a PHD it will help.