Many children act in TV shows. They work several hours every day, so they cannot go to a regular school. How do they get an education?

In Hollywood, where many TV shows are made, about forty teachers give lessons to the children in the shows. They teach wherever their pupils are working.

The teacher's job is very important. She is responsible for making sure that the child works only the permitted hours each week. She is also responsible for making sure that the child learns the required subjects and gets enough rest and play, together with his education.

Child actors are required to attend classes twenty hours each week. California law says that they must be taught from September to the middle of June. If they do not get good marks in school, they are not allowed to continue working in TV shows.

The children are usually good pupils, and most of their teachers like this special kind of work. Their classes are held in many interesting places. Sometimes the classroom is a riverboat. Sometimes it is the inside of a spaceship. Often the pupils become famous stars.

What is the main idea of the passage?