STEM+FAIR+idea+Ma

My STEM Fair project idea is on memory mnemonics. Mnemonics is a way to help you remember something. My project will be all about how mnemonics can help you remember important things like spelling words or state capitals in an easy way. My questions will be:
 * What is a mnemonic? How many different mnemonics are there?
 * Do mnemonics help you remember things better rather than without them?
 * How long will the mnemonic help you remember?
 * Are some types of mnemonics more effective than others?