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In 2023, 43 QIS used an observational tool and 20 used more than one tool. The Environment Rating Scales (ERS) were the most commonly used observational tools, which could be used for rating or quality improvement (26 QIS). The Classroom Assessment Scoring System (CLASS) was the second most commonly used tool (22 QIS). Some QIS used a self-developed or home-grown tool (11 QIS) or another tool not listed (7 QIS).  

The maps below show which states use each type of observational tool. Toggle between observational tools by using the buttons or arrows above the map. Hover over the states/territories for additional details.