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Classroom Assessment Scoring System

CLASS® is a flexible tool that focuses on the heart of great teaching: the teacher-student interactions proven to drive learning and development. Over 200 research studies demonstrate that children in classrooms with more effective teacher-student interactions, as measured by CLASS, have better social and academic outcomes. CLASS is included in 23 states’ QRIS measures for one simple reason: CLASS works.

Measure Teaching Quality

CLASS uses research-driven insights to measure the quality of teacher-student interactions across three domains.

Emotional Support
Emotional Support
Classroom Organization
Classroom Organization
Instructional Support
Instructional Support

Improve Teaching Quality

Research shows that, with the right supports, teachers can improve their interactions with children to cultivate supportive, structured, and engaging classroom experiences across the CLASS domains every day. In collaboration with Teachstone, the experts who developed the CLASS, we’ve designed tools to help.

CLASS® Literacy Support Classroom Kit

Support teachers in intentional planning of activities that promote children’s development of literacy skills with this comprehensive kit. This curated collection supports foundational literacy skills, promotes quality teacher-student relationships, and encourages ongoing reflection and growth of teachers’ practice.

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CLASS® Literacy at Home Kit

Empower families to engage in meaningful literacy experiences at home with the CLASS® Literacy at Home Kit. Designed to provide pre-k family members with the support, strategies, and resources to engage their children in meaningful and playful literacy experiences. Includes handout for families and materials they can use to support their child's literacy development and learning.

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CLASS® Emotional Support Kit

The kit is designed to help teachers understand how the emotional support domain is tied to children's social and emotional development. In addition to promoting children's ability to recognize and manage feelings in the preschool classroom, it includes mechanisms for tracking challenging student behavior, identifying underlying causes, and planning interventions proactively.

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CLASS® Instructional Support Kit

Over 20 years of measuring teacher-child interactions, we’ve noticed a trend. Teachers score the lowest on the instructional support domain. The Instructional Support Kit provides teachers with CLASS-based guidance on how to effectively use materials aligned to pattern-related developmental outcomes in mathematics in their classroom. It also helps teachers develop children’s thinking and language skills.

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CLASS® Products

Pre-K - 3rd CLASS® 2nd Edition enhanced scoresheets, designed to support effective and efficient observations and data collection. Certified CLASS Observers use score sheets when observing and scoring classrooms. Each booklet contains six observation sheets and one scoring summary sheet for recording notes and scores. Available in packs of 5 booklets, for a total of 30 observation sheets.
CLASS® 2nd Edition Observation Score Sheets - Pre-K - 3rd
Item: 301267
In Stock
$30.00
The CLASS 2nd Edition: Pre-K - 3rd Reference Manual contains the research and theory behind the CLASS tool, and provides additional insight and guidance in using CLASS within a CQI process and system.
CLASS® 2nd Edition Reference Manual - Pre-K - 3rd
Item: 301270
In Stock
$100.00
The CLASS 2nd Edition: Pre-K-3rd Manual Set provides both a printed version of the Reference Manual and the Observation Field Guide, as well as CLASS 2nd Edition Score Sheet Booklets (5 pack), providing comprehensive support, and a cost savings!
CLASS 2nd Edition: Pre-K-3rd Manual Set
Item: 301268
In Stock
$100.00
The CLASS 2nd Edition: Pre-K - 3rd Observation Field Guide provides the detailed descriptions for each dimension to guide observations and understanding of effective interactions across Pre-K through third-grade settings.
CLASS® 2nd Edition Observation Field Guide - Pre-K - 3rd
Item: 301269
In Stock
$75.00
Support teachers in intentional planning of activities that promote children's development of literacy skills with this comprehensive kit. Includes robust guidance for planning read-alouds, supporting phonological awareness, building alphabet knowledge and print awareness, and support all children and dual-language learners. This curated collection supports foundational literacy skills, promotes quality teacher-student relationships, and encourages ongoing reflection and growth of teachers' practice. Combine with the CLASS® Literacy at Home Kit (Item #37269), to empower and support families to extend children's learning and development in fun and engaging experiences at home.
CLASS® Literacy Bilingual Support Classroom Kit - Pre-K/Kindergarten
Item: 37268
In Stock
$430.00
Empower families to engage in meaningful literacy experiences at home with the CLASS® Literacy at Home Kit. Designed to provide pre-k family members with the support, strategies, and resources to engage their children in meaningful and playful literacy experiences. Includes handout for families and materials they can use to support their child's literacy development and learning. Build consistency of literacy learning experiences by using in conjunction with the CLASS® Literacy Support Classroom Kit - Item #37268.
CLASS® Literacy at Home Kit - Pre-K/Kindergarten
Item: 37269
In Stock
$68.00
The CLASS® Emotional Support Kit is the perfect way to help teachers promote children's ability to recognize and manage their feelings in their classrooms. This kit contains classroom materials and an Emotional Support guidebook with interactive reflection and planning tools full of strategies that will help teachers understand how the CLASS® Emotional Support domain is tied to children's social and emotional development. The tools also provide mechanisms for tracking challenging student behavior, identifying underlying causes, and planning interventions proactively. Designed to be used with a wet erase marker, the guide can be used repeatedly with different materials, areas of focus, or even by different teachers!
CLASS® Emotional Support Kit: Recognizing and Managing Feelings
Item: 34676
In Stock
$430.00
3 years & up. This CLASS® Instructional Support kit provides teachers with CLASS®-based guidance on how to effectively use materials aligned to pattern-related developmental outcomes in mathematics in their classroom. It also helps teachers develop children's thinking and language. Included guide encourages teachers to develop CLASS®-based planning and reflection practices that will help them all year long. Designed to be used with a wet erase marker, the guide can be used repeatedly with different materials, areas of focus, or even by different teachers! Includes a CLASS® Dictionary & Strategy Card bundle, as well as an invitation to join the CLASS® Learning Community online.
CLASS® Instructional Support Kit: Pre-K Patterns
Item: 94166
In Stock
$430.00
Effective teacher-student interactions are a primary ingredient of high-quality early educational experiences. With the popular CLASS® observational tool, schools can accurately assess classroom quality in pre-kindergarten based on teacher-student interactions rather than the physical environment or a specific curriculum. English version. Spiral-bound, 120 pages.
CLASS® Manual - PreK - English
Item: 15910
In Stock
$100.00
With the infant version of the trusted, widely used CLASS® tool, early childhood programs have an accurate and reliable way to assess teacher-infant interactions, a primary component of positive early experiences. Developed for use with children from birth to 18 months, the CLASS® Infant tool specifically focuses on how teachers engage with infants and support their learning and development during everyday routines and activities. With clear guidance and background information, this manual gives you a comprehensive introduction to the CLASS® Infant tool and how to use it effectively. You'll see how this standardized tool assess 4 dimensions of teacher-child interactions, establishes an accurate picture of interactions through repeated observation and scoring cycles, and highlights areas of strength and areas for growth. Spiral-bound. 64 pages.
CLASS® Manual, Infant - English
Item: 28486
In Stock
$100.00
The highly anticipated toddler version of the CLASS® tool is here -- providing early childhood programs with an accurate, reliable way to assess effective classrooms. For use with children from 15 - 36 months, this standardized observation tool measures the effectiveness of interactions between teachers and children, a primary ingredient of early educational experiences that prepare children for future school success. Spiral-bound, 80 pages.
CLASS® Manual - Toddler - English
Item: 26057
In Stock
$100.00
Effective teacher-student interactions are a primary ingredient of high-quality early educational experiences. With the popular CLASS® observational tool, schools can accurately assess classroom quality in K-3 classrooms based on teacher-student interactions rather than the physical environment or a specific curriculum. Spiral-bound. 128 pages.
CLASS® Manual - Grades K-3 - English
Item: 15911
In Stock
$100.00
Introduce teachers to the 10 dimensions of the CLASS® Pre-K tool with this concise quick-guide, which includes practical teaching tips for strengthening each of the areas assessed with the popular observational tool. This guide is used with the bestselling CLASS® observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs and PreK and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. English. 28 pages.
CLASS® Dimensions Guide - PreK - English
Item: 24489
In Stock
$35.00
This dimensions guide is great for teachers and anyone interested in understanding why classroom interactions matter and how they can be improved with the CLASS® tool. WIth this guide you will be able to explore CLASS® Infant domains and dimensions, find clear explanantions of effective interactions, and learn practical strategies for improving interactions. English version.
CLASS® Dimensions Guide - Infant - English
Item: 28970
In Stock
$35.00
Introduce teachers to the 8 dimensions of the CLASS® Toddler tool with this concise quick-guide, which includes practical teaching tips for strengthening each of the areas assessed with the popular observational tool. This guide is used with the bestselling CLASS® observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs and PreK and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. 28 pages. English version.
CLASS® Dimensions Guide - Toddler - English
Item: 29056
In Stock
$35.00
Introduce teachers to the 10 dimensions of the CLASS® K-3 tool with this concise quick-guide, which includes practical teaching tips for strengthening each of the areas assessed with the popular observational tool. This guide is used with the bestselling CLASS® observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs and PreK and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. 28 pages.
CLASS® Dimensions Guide - K-3 - English
Item: 29057
In Stock
$35.00
This tri-fold laminated sheet is a handy reference for users of the popular CLASS® observation tool. Available in convenient packages of 5, this sturdy quick-sheet shows evaluators what to look for while observing each of the 10 CLASS® dimensions and scoring the tool. This product is part of CLASS®, the bestselling classroom observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs, PreK, and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. Set of 5.
CLASS® Dimensions Overview - PreK - Grade 3 - Set of 5 - English
Item: 29055
In Stock
$50.00
This tri-fold laminated sheet is a handy reference for users of the CLASS® Infant observation tool. Available in convenient packages of 5, this sturdy quick-sheet shows evaluators what to look for while observing each of the CLASS® Infant dimensions and scoring the tool. Set of 5.
CLASS® Dimensions Overview - Infant - Set of 5 - English
Item: 28484
In Stock
$50.00
This tri-fold laminated sheet is a handy reference for users of the popular CLASS® Toddler observation tool. Available in convenient packages of 5, this sturdy quick-sheet shows evaluators what to look for while observing each of the 8 CLASS® Toddler dimensions and scoring the tool. This product is part of CLASS®, the bestselling classroom observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs, PreK, and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. Set of 5.
CLASS® Dimensions Overview - Toddler - Set of 5 - English
Item: 26068
In Stock
$50.00
Available in packages of 5 booklets, each with 6 observation sheets and 1 scoring summary sheet, these are the forms needed to conduct the Classroom Assessment Scoring System® (CLASS® ) observation. These forms are a part of CLASS®, the bestselling classroom observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs, PreK (in English and Spanish), and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. Set of 5 booklets with 8 pages each.
CLASS® Score Sheets - PreK-Third Grade Forms - Set of 5 - English
Item: 87616
In Stock
$30.00
Each booklet contains 6 observation sheets, 1 scoring summary sheet, and 8 note-taking pages, these are the forms needed to conduct the Classroom Assessment Scoring System® (CLASS) Infant observation. These forms are part the infant version of the trusted, widely used CLASS® tool, the bestselling classroom observation tool that CLASS® Infant tool was developed for use with children from birth to 18 months and assesses 4 dimensions of teacher-child interactions: relational climate, teacher sensitivity, facilitated exploration, and early language support. Set of 5.
CLASS® Score Sheets - Infant Forms - Set of 5 - English
Item: 90820
In Stock
$30.00
Available in packages of 10 booklets, each with 6 observation sheets and 1 scoring summary sheet, these are the forms needed to conduct the Classroom Assessment Scoring System® (CLASS® ) Toddler observation. These forms are a part of CLASS®, the bestselling classroom observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs, PreK, and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. Set of 5 booklets with 8 pages each.
CLASS® Score Sheets - Toddler Forms - Set of 5 - English
Item: 90822
In Stock
$30.00
CLASS® 2nd Edition Infant-Toddler Manual Set includes key enhancements that make it easier to understand, access, and observe effective interactions in infant and toddler learning settings.
CLASS® 2nd Edition Infant-Toddler Manual Set - English
Item: 302741
In Stock
$100.00
The CLASS® 2nd Edition Infant-Third Reference Manual contains the research behind the CLASS tool, and provides additional insight and guidance on using CLASS within a CQI process and system.
CLASS® 2nd Edition Infant�3rd Reference Manual English
Item: 302631
In Stock
$45.00
The CLASS® 2nd Edition Infant-Toddler Observation Field Guide provides detailed descriptions of each dimension to guide observations and understanding of effective interactions across infant and toddler settings.
CLASS® 2nd Edition Infant�Toddler Observer Field Guide English
Item: 302635
In Stock
$75.00
CLASS® 2nd Edition Infant-Toddler Observation Score Sheets must be used by those conducting CLASS observations in infant and toddler settings. Each booklet contains six observation sheets and one scoring summary sheet for recording notes and scores. Available in packs of 5 booklets, totaling 30 observation sheets.
CLASS® 2nd Edition Infant�Toddler Score Sheets - English
Item: 302637
In Stock
$30.00
Keep interactions top of mind with this handy guide that builds understanding of the CLASS framework. The CLASS® Infant-Toddler Interactions Dimensions Guide is designed for ease of use, offering concise explanations of CLASS domains and dimensions, along with descriptions of effective interactions and practical strategies. This guide is ideal for educators, coaches, and anyone looking to understand the importance of interactions.
CLASS® 2nd Edition Infant�Toddler Interactions Dimensions Guide English
Item: 302633
In Stock
$35.00
Each booklet contains six observation sheets and one scoring summary sheet for recording notes and scores. Available in packs of 5 booklets, for a total of 30 observation sheets. English version.<br />  
CLASS® 2nd Edition Pre-K - 3rd Grade Environment Combo
Item: 302172
In Stock
$30.00
Support and enhance the cognitive development of infants and toddlers with this thoughtfully designed bilingual kit. Packed with evidence-based strategies and engaging materials, it provides educators with practical tools to nurture early brain development. This kit encourages rich, interactive experiences in both English and Spanish - laying the foundation for critical thinking, memory, attention, and early language skills.
Infant Toddler CLASS® Cognitive Bilingual Support Kit
Item: 301837
In Stock
$430.00
Strengthen educators' understanding and practice of CLASS with our easy-to-use guide. Designed to support educators' knowledge and practice of meaningful and effective interactions, this guide helps educators understand: Why interactions are important for children, What children experience when their educators prioritize and enhance specific types of interactions in the learning setting, How to improve interactions in their daily work with children, and How each component (Dimension) is measured by CLASS.
Pre-K-3rd CLASS Dimension Guide - English
Item: 301265
In Stock
$35.00
CLASS® Environment Reference Manual is a resource for CLASS Observers, to guide the use of the CLASS Environment with the CLASS tool during observations. Observers will find guidance for inclusion, how to use CQI system, and more!
CLASS® Environment Reference Manual - Infant - Toddler
Item: 301855
In Stock
$65.00
The CLASS Environment Reference Manual is an essential resource for CLASS® Observers, designed to guide the use of the CLASS Environment tool alongside the CLASS tool during observations. Observers will find considerations for diversity, equity and inclusion, how to use within a CQI system, and more!
CLASS® Environmental Manual - Pre-K - K - Second Edition
Item: 301853
In Stock
$65.00
CLASS Observers use score sheets specifically for the CLASS Environment™. Each booklet contains 8 observation sheets, and conveniently available in packs of 5 booklets, providing a total of 40 sheets. CLASS Environment™ is designed to complement CLASS® observations and is not intended for independent assessment. A single CLASS Environment score sheet should be used. Individual score sheets can be detached and insert into the CLASS Observation Score Sheets booklet.
CLASS® Environment Score Sheets - Infant - Toddler
Item: 301854
In Stock
$20.00
Certified CLASS Observers use specialized score sheets tailored to the CLASS Environment™. Each booklet contains 8 observation sheets, and they are conveniently available in packs of 5 booklets, providing a total of 40 sheets.
CLASS® Second Edition Environmental Score Sheets - Pre-K - K
Item: 301852
In Stock
$20.00
Available in packages of 10 booklets, each with 6 observation sheets and 1 scoring summary sheet, these are Spanish forms for conducting the Classroom Assessment Scoring System® (CLASS® ) observation. These forms are a part of CLASS®, the bestselling classroom observational tool that measures interactions between children and teachers -- a primary ingredient of high-quality early educational experiences. With versions for toddler programs, PreK, and K-3 classrooms, the reliable and valid CLASS® tool establishes an accurate picture of the classroom through brief, repeated observation and scoring cycles and effectively pinpoints areas for improvement. Set of 10 booklets with 8 pages each. Spanish.
CLASS® Score Sheets - PreK Forms - Set of 10 - Spanish
Item: 29059
In Stock
$50.00
Foster the development of self-regulation skills in infants and toddlers with the help of this bilingual, research-based kit. Designed to support emotional and behavioral growth during the earliest stages of life, the kit includes practical tools and strategies that help children learn to manage their feelings, behaviors, and responses. Through interactive, play-based activities presented in both English and Spanish, ceducators can create nurturing routines that encourage focus, patience, and emotional awareness - laying the groundwork for long-term success.
Infant Toddler CLASS® Social-Emotional Bilingual Kit
Item: 301836
In Stock
$430.00