Physics, engineering, many other scientific fields; and you never know when the need might just pop up. Basically, maths is a life skill.

I think most kids have a mental block against maths because it's not introduced to them in ways that make them immediately see the benefit of it. (Notice how these same kids can count money. ) You just need to find a real-world example application for concept you teach. I am sure there are many ideas you could use from the field of physics alone.