Have you ever seen a grown-up who has learned a lot about something and is really good at it? They are often called a master because they have put in a lot of time and effort to get really good at something.
Now imagine that this master wants to teach someone else all that they know about this thing. They might choose a pupil, which is like a student that they will teach and help them learn all of the things they have learned.
The master will spend a lot of time with the pupil, showing them how to do things and explaining everything they know. The pupil will be like a sponge, soaking up all of the information and trying their hardest to learn everything they can from the master.
The pupil might make mistakes or have trouble understanding things at first, but the master will be patient and keep teaching until the pupil understands. Over time, the pupil will start to get better and better at the thing they are learning, just like the master.
Eventually, the pupil might even become a master themselves and be able to teach someone else all that they have learned. This is how knowledge and skills get passed down from one generation to the next, and it all starts with a master and their pupil.