Learning is hard Before we start I want to tell you about the most wonderful “machine” on the planet. It’s not a supercomputer but it is fantastic in terms of it’s computing power what is it? Your brain! It is made up of networks of neurons (cells) 86,000,000,000 (86 billion) in your head, more than the stars in our galaxy. A memory is created in a network i.e. when neurones are joined together. Whenever you learn, you are creating new memories, new networks! So let’s think about how we can do this efficiently.