There are many thousands of words in English. Trying to learn them all using memorization is too difficult, but learning rules gives us the ability to work out how to spell almost any word. Academic research into the most effective way to teach reading and spelling has repeatedly found that the best approach is understanding the structure and rules of English... Learning rules helps the brain make letter-sound connections. Once the connections have formed a permanent memory, the rule is no longer needed- a process called Orthographic mapping. For children, a rule benefits from being associated with a tangible picture that can be imagined. To make the rules more memorable, they have been given a special Nessy strategy.