Lesson plan

Solve decimal division problems by using the standard algorithm

teaches Common Core State Standards CCSS.Math.Content.6.NS.B.3 http://corestandards.org/Math/Content/6/NS/B/3
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: An algorithm can be an effective and efficient way to divide decimals. This lesson builds on students' work in fifth grade with visual and other conceptual models associated with division of decimals. The purpose of this standard is for students to understand and fluently use the standard algorithm for dividing decimals. This builds towards students' division of rational numbers in 7th grade. Successful use of the standard algorithm is the goal of this lesson. However, conceptual models should be used to make connections to the algorithm and lead to students' using it to successfully divide whole numbers. In this task, students will find the price per pound of three produce items. They will then compare to the prices to the national average price of each item to determine whether the produce items were purchased above, at, or below the national average price. The students are encouraged to use any method to find their solutions. However, the debrief focuses on helping the students understand the decimal division algorithm with special emphasis on conceptual understanding of the movement of the decimal. Vocabulary: dividend, divisor, quotient, remainder, whole number place value vocabulary (thousands, hundreds, tens, ones), decimal point, decimal place value vocabulary (tenths, hundredths, thousandths)