The Keystone Collaboration Collection is a compilation of books created by teachers and literacy coaches for purposes of assessing and monitoring student progress in text reading. This collection has been validated by research.

There are three important reasons why the Keystone books can be useful for progress monitoring:

1. they represent a wide variety of text types, genres, formats, and writing styles;
2. they are not aligned with any particular publisher; and
3. they can be used interchangeably for guided reading group and progress monitoring.

This collection is of particular value to reading teachers who have adopted the Comprehensive Literacy Intervention Model.

The Keystone Collaboration Collection contains 65 books from 9 publishers. They span guided reading levels A through M and come with a set of labels. Each label includes guided reading level, word count, error count (to determine instructional level), genre, item number, publisher, and a short book introduction.