STEM education is when teachers help children learn about four important parts of learning - Science, Technology, Engineering, and Mathematics. This is important to learn because it helps us understand more about the world around us, and it helps us learn problem solving skills.
Science is when we learn about how things work, like the stars in the sky or plants growing. Technology is when we learn about how things are made or how they work, like a computer or phone. Engineering is when we learn about building things like bridges or machines. And mathematics is when we learn about numbers and how to use them to understand things.
At school, teachers will help you learn about these things by doing fun experiments, building things, learning to code, and playing math games. By learning about all of these things, you can start understanding more about the world around you and develop skills that will be really helpful in the future.