IELTS Teacher Worth Their Salt

The phrase is to be worth your salt. We're not exactly sure where this comes from. You guys can look it up online. There's always a history to every phrase and I'm not a historian. So we talk about language. If you're really interested in history, look it up and do the research to find out where it comes from. But let's throw out some examples, Michelle, so that our listeners can see how this is used.