Is this sentence ¨ Michael Piscal, Headmaster of View Park Prep Charter School in Los Angeles said, "It's not working for teachers, it's not working for students—it's not working for society." ¨ a main idea or claim ?

claim

Explanation:

A main claim is a position that the author makes in relation to an argument previously presented, but not only that, since this position governs all the ideas and arguments that the author will give throughout the text.

The text shown above shows a position, that is, an opinion of an author about something that is being done in the educational field and that is not being beneficial to anyone. As we saw before, a main claim is a position, so we can say that main claim is the answer to your question.

she was trying to use   reliable narrator.