Here are two ways to learn that the heart has four chambers. One: say "four chambers" ten times. Two: ask why. The heart is two pumps side by side, one to the lungs and one to the body, and each pump has a room that receives blood and a room that pushes it out. Two pumps times two rooms is four.
Key idea
When you ask why and how, you connect the new fact to things you already know. Those connections are what make a memory easy to find later.
Worked example: Worked example
Which question helps you remember that the Nile flows north?
- "How many times can I say it?" adds no meaning.
- "Where is the high ground, and where is the sea?" connects the fact to how rivers work: rivers flow downhill to the sea, and the Nile's sea, the Mediterranean, lies to its north.
Answer: Asking where the high ground and the sea are.
Why it works
Thinking about meaning is a kind of encoding. Memory researchers call it elaboration: adding details and links to a new fact.
Common mistake
Using a memory trick in place of understanding. A trick can hold a fact in place, but understanding gives it roots.