The most widely used cue method is the flashcard. Nowadays these can be electronic in nature and there are many apps or sites where these can be created or downloaded (see section 15), although of course the ‘traditional’ index card style approach is just as beneficial. Which ever method you use the principle is the same:
One of the primary reasons for their success is they require active recall and each time this is practiced you force your brain to remember or recall information. Below are 2 examples of cue cards showing carbohydrates and Pythagoras Theory – the blue side being side one and green being side two.