LEVEL 4: READING ALONE A greater variety of language and types of information than at level 3. More challenging vocabulary is introduced. Sentences remain clear, interesting, and unambiguous, but are slightly more complex.Guided Reading Levels: N, OThis high-interest nonfiction book introduces children to the extensive role rivers play in our world. Famous rivers and their different characteristics, including types of habitats that live inside of them, important inventions created to utilize such a natural power source, natural disasters, and the role rivers play in our ecosystem are all highlighted in this informative chapter book. With content area vocabulary, call-out boxes, and a glossary young learners can comprehend, the content remains clear, interesting and slightly more complex for advanced young readers.