Our video coding tool, the Quality of Mathematics in Instruction instrument, was developed to allow observers to evaluate the quality of the mathematics in instruction. It is intended to capture a range of teacher work with mathematical content, curriculum materials, and students. The tool consists of 83 codes grouped into five sections, and an accompanying glossary that provides overall instructions and details on each code. The five sections are: instructional formats and content, knowledge of mathematical terrain of enacted lesson, use of mathematics with students, mathematical features of the curriculum and the teacher's guide, and use of mathematics to teach equitably. To learn more about the development of the tool, please .
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