This book contains a collection of formal and informal reading assessments for use with students in Grades K-12. These assessments assist the teacher in targeting areas of strength and weakness, in monitoring student reading development, and in planning appropriate instruction. Unlike large-scale achievement tests, the majority of these assessments can be administered individually. Each assessment was selected because it measures an important research-based reading skill and because it is quick, reliable, and easy to use. Each assessment provides clear and accurate individual student information. The assessments included in this book are informal assessments designed to measure specific skills critical to successful reading. Some of the assessments are curriculum-based, while others are criteria-based, depending on the purpose of the assessment. Similarly, some assessments target specific skills, some are instruments for broader screening, and some can be used for both types of assessment. Spanish assessments are provided for the early grades where many students may still be in bilingual programs or may be receiving Spanish primary language instruction before transitioning to English programs. Profile Forms and Class Records found in the Appendix provide an easy way for teachers to summarize assessment results. Appended are: (1) CORE Reading Assessment Profile Forms; (2) CORE Reading Assessment Class Records; (3) Performance Criteria for Fluency and Fluency Scores: A Discussion; (4) Assessment-Driven Instruction: A Systems Approach; and (5) Resources for Assessing Reading. [Contributing authors include: Orna Lenchner, Michael Milone, and Jacalyn Mahler.]