I always have problems remembering things that I have learnt long ago. If I don't practice again, I tend to forget things.
That is why I am always finding for information and activities to restudy and learn new things too.
An easy way to learn is by watching videos, and you must know that youtube is full of videos like that. So don't be afraid to give a time to find information on youtube.I recommend you to check the page of the bristishcouncil, so you can also check the videos like the one below.
They are good to be used with your students. They are simple and very "straight to the point".