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Guide Essential Reading Practice with Accelerated Reader Enterprise

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ATOS Readability System Requirements

A Breakthrough in Measuring Readability:
ATOS™ Readability Formula

Guiding students to appropriate-level books is now much easier and more accurate than ever before because Accelerated Reader Enterprise uses the ATOS Readability Formula for Books. ATOS is the first formula to include statistics from actual student book-reading (over 30,000 students, reading nearly 1,000,000 books), not just data based on short text passages.

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For more information, see this article:
Using Readability Levels to Guide Students to Books

The ATOS Analyzer

The ATOS analyzer provides an ATOS reading level for text you submit for analysis. Submitting text for analysis is quick and easy. First, determine which ATOS option will work the best for the text you want analyzed. There are three different options. Select one of the choices below that best matches your needs.

ATOS for Books
The ATOS Readability Formula for Books is designed to provide a reading level based on the complete contents of a book. It requires submission of the complete text from a book, and will provide the most accurate ATOS level.

ATOS for Books with Estimated Word Count
This variation of the ATOS Readability Formula for Books does not require the entire text of a book. It requires submission of three 150-word samples from different sections of a book, and an estimated word count. (Instructions for estimating word count.)

ATOS for Text
The ATOS Readability Formula for Text works well for short stories, magazine and newspaper articles, test items, and other classroom materials. It does not make adjustments based on length of text. This formula requires submission of the complete text.

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