Sure. That's good idea. Not only class in ES6 but all about ES6/ES7
- When you teach them variables, let talk about var, const, let instead of var only
- When you teach them async, let talk about Promise, Generator, async/await instead of callback only.
- When you tech them OOP, let talk about class instead of confusing them with the concepts Classical Inheritance, Prototype inheritance, etc
- and so on