Constructivism is a theory about how people learn. It says that learners build their own understanding by actively making sense of new information rather than just memorizing what they're told. Think of it like this: when you read about ancient Egypt, you don't just store facts in your brain like files on a computer. Instead, you connect what you're reading to things you already know, ask questions, maybe draw a pyramid, and create your own mental picture of what Egyptian civilization was like.

A teacher using constructivist methods might present students with a problem to solve rather than just explaining the solution. For example, instead of telling the class how gears work, she might give groups different-sized wheels and ask them to figure out how to make one wheel turn another. As students experiment, discuss, and test ideas, they construct their own understanding of how gears work, which can stick better than simply reading about it.

The idea comes from observing that people remember and understand things better when they actively participate in learning rather than passively receiving information. When you struggle with a challenging math problem and finally figure it out yourself, you've engaged in constructivist learning. The struggle itself, including false starts and corrections, helps build deeper understanding than simply copying down the right answer would.