High school math teachers will love these sheets of word problems from the UK. They are attractive and well writtten. You can download and print them. I like how students have formulas on their sheets to help another student with their math problems. These are some of the most popular math resources from this site.
Teacher shortages are going to be looming in our future. Here is an article from the European Commission. The number of graduates specializing in education is falling. Honestly, I think that many are going to regret the many tirades that society has had against teachers and will realize that perhaps that we have more systemic issues than we care to realize. (Part of which is often, that poorer teachers cannot be fired, however, to blame all of education's ills on that one fact is like blaming a fly flitting in front of your eyes for the reason you ran into a house.)
OK, so if you're looking for an amazing resource on Pinterest, Megan is it. With over 2703 followers, she's got a lot of classroom ideas for almost everything. A definite go-to person. I'm following all of her boards. If you want to see a pinterest-expert in action, this is it.