Adding class exercises

[xdl]

Module: JS3 Week(s): Week 3

Description

• Introduces the term method
• Adds in some ES6 class exercises (~20 mins) to do in breakout rooms

I'm hoping difficulty is fine, as long as they've come across setInterval for the 2nd exercise.

Who needs to know about this?

@ChrisOwen101 @dmitrigrabov @louisechow @DomVinyard @esmehm

[ChrisOwen101]

Looks good to me but I'd like to get another set of eyes on it as well