This document discusses main ideas and supporting details in stories and paragraphs. It defines a main idea as what a story is about, and supporting details as things that describe the main idea and make it stronger. Two examples are provided of passages with questions about their main ideas. The main idea of the first passage is that Niagara Falls is one of the most beautiful sights in North America. The main idea of the second passage is that the Statue of Liberty has become a universal symbol of freedom.