Lesson plan

Compare and order values and absolute values by using a number line

teaches Common Core State Standards CCSS.Math.Content.6.NS.C.7d http://corestandards.org/Math/Content/6/NS/C/7/d
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2

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Big Ideas: A number to the right of another on the number line is the greater number. A number may be less than another number but have a greater absolute value. This lesson builds on students' work with ordering and comparing rational numbers. The task uses descriptions of team scores in a trivia game. Students are presented with clues indicating how each team placed and are asked to put the team scores on a number line and to then order these by value and absolute value. By reasoning about whether a team's score was to the left or right of 0 and greater or less than another team, students are positioned to discover that a lesser number may have a greater absolute value. The mathematical concepts in this lesson build toward students' future work with inequalities in grades 6 and 7. Vocabulary: absolute value, negative, positive, opposite, integer