Lesson plan

Compare and order positive and negative numbers using the context of temperature

teaches Common Core State Standards CCSS.Math.Content.6.NS.C.7a http://corestandards.org/Math/Content/6/NS/C/7/a
teaches Common Core State Standards CCSS.Math.Content.6.NS.C.7b http://corestandards.org/Math/Content/6/NS/C/7/b
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1

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Big Idea: A number that is to the right (or above) another number on the number line is the greater number. This lesson builds on students' work with understanding the number line as including both positive and negative numbers. This task uses a temperature map of the United States and asks students to design a driving route that uses either all-increasing or all-decreasing temperatures. Students order the temperatures and use inequality signs to compare them. By interpreting inequality statements and linking them to the everyday language of "warmer" and "colder," students develop a real-world context for understanding why the further a negative number is from 0, the less its value. The mathematical concepts in this lesson provide foundations for future work in grades 6 & 7 with absolute value, adding and subtracting signed numbers, and writing inequalities to compare more than two numbers. Vocabulary: positive, negative, inequality, Fahrenheit, Celsius, increasing, decreasing, horizontal, vertical