“…We readily acknowledge the value of other observational approaches and in fact believe the field undoubtedly benefits from systematic inquiry into competing alternatives-in relation to standardization, replication, and scalability. The CLASS framework is one of several descriptions of classroom environments or quality teaching put forth in the educational and developmental literatures (e.g., Brophy, 1999;Brophy & Good, 1986;Eccles & Roeser, 1999;Gage, 1978;Pressley et al, 2003;Soar & Soar, 1979). For example, Brophy (1999) describes 12 principles of effective teaching, including supportive classroom climates, opportunities to learn, curricular alignment, thoughtful discourse, scaffolding engagement, and achievement expectations, each of which are based on research findings and theories of teaching and learning.…”