The Keystone Book Collection is a compilation of books created by teachers and literacy coaches for purposes of assessing and monitoring student progress in text reading. On the back of each book is a label that includes the guided reading level, word count, error count (to determine instructional level), genre, item number, publisher, and a short book introduction.
There are three important reasons why the Keystone Books can be useful for progress monitoring:
1) represent a wide variety of text types, genres, formats, and writing styles;
2) are not aligned with any particular publisher; and
3) can be used interchangeably for guided reading group and progress monitoring.