Time scale calculus looks at how things change over time. Imagine you have a piece of paper with a line drawn on it. This line starts off straight, but then curves, then straightens out again and so on. Time scale calculus looks at how this line changes and moves over time. We can use time scale calculus to track the changes in things like weather, population growth, or stock prices. By looking at the changes over time, we can better predict what will happen in the future.