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® 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® 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® Products