![]() As the Progressions state, “relating units within the traditional system provides an opportunity to engage in mathematical practices, especially ‘look for and make use of structure’ (MP.7) and ‘look for and express regularity in repeated reasoning’ (MP.8)” ( Progressions for the Common Core State Standards in Mathematics, K-5 Geometric Measurement, p. The unit provides rich opportunities for students to engage with the mathematical practice standards. At the end of each topic, students apply their new learning in the context of solving multi-step word problems involving unit conversions. Then, in Topic C, students deal with more complex cases of fractional and decimal unit conversions. Thus, students will explore both metric and customary systems of measurement, starting with unit conversions from larger to smaller metric units in Topic A, and then similarly with customary units in Topic B. Because some non-metric units of measure are common in particular contexts, students need to develop familiarity with multiple systems of measure, including metric and customary systems and their relationships" ( The Metric System, NCTM). Thus, while the unit focuses on supporting cluster standards, their instruction enhances much of the major work of the grade, including place value (4.NBT.A), arithmetic operations (4.NBT.B), word problems (4.OA.A), and fractions (including decimal fractions) (4.NF).Īs NCTM’s position statement on metric measurement states, “tudents need to develop an understanding of metric units and their relationships, as well as fluency in applying the metric system to real-world situations. Lastly, as directly stated in the language of 4.MD.2, students will convert units and solve problems involving fraction and decimal numbers. Further, “students also combine competencies from different domains as they solve measurement problems using all four arithmetic operations, addition, subtraction, multiplication, and division” ( Progressions for the Common Core State Standards in Mathematics, K-5 Geometric Measurement, p. As the Progressions state, “relating units within the metric system is another opportunity to think about place value” ( Progressions for the Common Core State Standards in Mathematics, K-5 Geometric Measurement, p. Not only does this unit build on measurement work from previous grades, but it also relies on myriad skills and understanding developed throughout 4th grade. They’ve noticed the relationship between some units to help them understand various measurement benchmarks but have not yet done any unit conversions. In previous grades, students have worked with many of the metric and customary units (2.MD.1-6, 3.MD.1-2). Students will also solve word problems involving measurement and measurement conversion. In this unit, students relate multiplication, particularly their understanding of “times as many” developed throughout 4th grade, to the conversion of measurement units. ![]()
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