Constructivism is a fancy word meaning that people create their own understanding of things by building it from their own experiences and thoughts. In science education, constructivism means that students learn by discovering, exploring, and doing things on their own.
Imagine you are playing with building blocks, and you use them to build a tower. Constructivism says that you learn by doing this, and each time you build something, you learn more about how to make it better. Similarly, in science class, you learn by doing experiments, trying out your own ideas, and creating your own understanding of how things work.
Teachers who use constructivist methods encourage students to ask questions, explore their own ideas, and make connections with what they already know. They also allow students to come up with their own hypotheses and test them out in experiments.
Constructivism helps you become an active learner, meaning you take charge of your own learning and create your own meaning behind what you learn. It's like being your own scientist, discovering new things and understanding the world around you in a way that's unique to you.