The Classroom Assessment Scoring System® (CLASS)

Interactions matter. And, CLASS is the way to focus, measure, and improve your interactions to drive impact.

Single Focus. Big Impact.

CLASS not only defines teaching quality through the lens of interactions, it provides the ability to measure and improve the interactions that matter most for children’s outcomes. And, it’s a journey of continuous improvement that is data-driven.

As you implement CLASS, you will:

  • Focus on high-quality interactions and create a shared understanding of quality in your program
  • Measure the quality of interactions to create a system that enables data-driven improvement
  • Improve teaching quality through tailored and individualized professional development

Learn more about the exciting enhancements coming to CLASS 2nd Edition and create a transition plan that works for your program!

family child care provider bends over preschool girl looking at artwork

Make the Switch to CLASS 2nd Edition When You're Ready

Every program is on a different part of its quality improvement journey, and we recognize that transitions take time. We’re here to support your program as you make the move to CLASS 2nd Edition. We anticipate that programs may need up through the school year 2024-2025 to prepare.

During your transition period, we recommend:

  1. Learning about CLASS 2nd Edition.
  2. Training your observers and educators on the enhancements with this new version.
  3. Continuing using CLASS 2008 until you have set a date for when you plan to switch observations to CLASS 2nd Edition.

Over 200 research studies prove children in classrooms with higher CLASS scores demonstrate better social-emotional, cognitive, and academic outcomes.


With a focus on research-based, developmentally appropriate interactions, CLASS is used across all ages, all classroom settings, and alongside any curriculum.


CLASS is the only assessment system that provides teachers the research-proven insights, skills, and strategies they need to improve interactions, the most critical component of their teaching practices.


Our CLASS online platform, myTeachstone, streamlines the data collection, coaching, and professional development processes, making it easier than ever to improve teacher-student interactions.


Create life-changing classroom experiences.

Build shared expectations for high-quality CLASS provides a common, objective, and measurable definition of effective teaching across all age groups.
Develop children’s core critical skills CLASS supports interactions that develop children’s ability to relate, self-regulate, communicate, and think - the core skills critical to academic learning.
Decrease challenging behaviors CLASS promotes building emotional support, and research has shown stronger emotional connections between the teacher and children lowers frequency of problem behaviors.
Make data-driven improvement decisions CLASS gives insight into teaching quality in a single classroom, and across a program, highlighting trends and providing the opportunity to support improvement.
Inform meaningful coaching CLASS data provides the blueprint for creating an individualized coaching and professional development plan that meets the direct need of each teacher.
Minimize the educational opportunity gap CLASS provides the tools to focus, measure, and improve effective teaching, which research suggests may close the educational opportunity gap.

Learn how CLASS is used help each and every child thrive in school and life:

Dual Language Learners

All children, including Dual Language Learners, can benefit socially and academically from classrooms with high-quality educator-child interactions as measured by CLASS.
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Family Child Care

Teachstone is committed to supporting family child care providers to ensure all children are exposed to effective interactions promoting learning and development.
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Head Start

Teachstone works with Head Start programs all over the country to ensure that children experience effective interactions and to support the educators working in those programs.
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Did you know that CLASS is being used in more than 50 countries around the world? You can find select CLASS resources and products in Spanish and French to support our ever-growing network. Learn more about the widespread reach of CLASS here.
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Children with Disabilities

As educators interact with children with disabilities, they connect in ways that cultivate emotionally supportive relationships, engage learners in ways that create a context for learning, and leverage instructional support tailored to the needs of each child to inspire learning.
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Improve interactions, improve child-outcomes.

There is a reason CLASS is the leading assessment tool in QRIS, and is the Office of Head Start’s chosen quality assessment tool — it works.

“Of the five individual quality indicators (typically in QRIS systems), the CLASS measure of teacher-child interaction quality consistently was the strongest predictor of children’s learning”

Science Mag



Maximize the potential for every child.

Focus, measure and improve classroom interactions -- a key factor proven to drive children’s academic and life-long success.