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The Classroom Assessment Scoring System (CLASS):

Is a system for observing and assessing the quality of interactions between teachers and students in classrooms.
Measures instructional and social interactions proven to contribute to students' academic achievements and social competencies.


CLASS Policy BriefWhy CLASS Works!
Download this 4-page policy brief on the CLASS and effective teacher-student interactions.
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Effective Interactions Video
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CLASS Website Components  
Brooks Manual

Pre-K and Elementary Manuals
Purchase CLASS manuals for Pre-K and Elementary through the Brookes Publishing website.
CLASS Video Library
• Contains over 335 video clips.
• Illustrates high- quality teacher-child interactions.
• Contains authentic teaching examples.
• Includes Pre-K, elementary & secondary classrooms.
CLASS manual
Subscriptions and CLASS Materials
Use our subscription order form for:

• CLASS Secondary Manuals
• CLASS Video Library Subscriptions

Please contact us at office@teachstone.org or 1-866-988-8352.


CLASS is funded in part by the Foundation for Child Development and is part of CASTL at the University of Virginia   ©2007-2008 CLASS