Across the world, there is growing interest in observing teachers’ classroom practice, for teacher performance evaluation and incentives, program impact evaluation, formative feedback to teachers, and research on the determinants of student learning. For observations to generate meaningful data, they must be carried out using valid instruments, standardized protocols, and trained observers. A number of different observation instruments have been used in the US, but only two have gained any traction to date in developing countries-the Classroom Assessment Scoring System, CLASS, and the Stallings classroom observation instrument.

Zhao Ying. A Comparative Study of the CLASS and the Stallings Instruments on Teaching Evaluation in Developing Countries--With Chile As Case Study. Frontiers in Educational Research (2020) Vol. 3 Issue 4: 81-82. https://doi.org/10.25236/FER.2020.030420.

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