Data is information, especially information collected and stored for a specific purpose. Scientists gather data from experiments, teachers collect data about student progress, and weather stations record data about temperature and rainfall.

Data can be numbers, measurements, facts, observations, or even words and images. When your doctor measures your height and weight, that's data about your growth. When you take a reading quiz and your teacher records the scores, those scores become data she can use to plan future lessons. A scientist studying plants might collect data about how much sunlight each plant receives, how often it's watered, and how tall it grows.

Data becomes powerful when you organize and analyze it to spot patterns or answer questions. A baseball team might collect data about batting averages to decide which players should start. A video game company collects data about which levels players find too easy or too hard, then uses that information to improve the game.

Raw data often doesn't mean much by itself. A long list of temperatures is just numbers. But when you organize that data into a graph showing how temperature changed over the year, suddenly you can see patterns and draw conclusions. That's why people say “data tells a story” when it reveals something interesting or important.