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Unit 3 3rd grade cs 2012 2013

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Unit 3 3rd grade cs 2012 2013

1. 1. Isaac School District, No. 5 Mathematics Curriculum Guide: Third Grade Unit 3 Surveys and Line Plots: Data Analysis Total Sessions: 26Big Ideas: Essential Questions:Students will understand that:  How are multiplication and division alike?  Multiplication and division is the grouping and ungrouping of objects using patterns to solve everyday real world problems.  What happens to the value of a number when you multiply it?  There is an inverse relationship between multiplication and division.  How might you use multiplication or division to solve problems in the real world?Unit Vocabulary: landmark numbers, sequence, collecting, collection, difference, subtraction facts, quantities, add up, subtract back Domain: Number and Operations in Base Ten (NBT) AZ Math Standards Mathematical Practices Cluster: Use place value understanding and properties of operations to perform multi-digit arithmetic. (A range of algorithms may be used.)Students are expected to:3.NBT.1. Use place value understanding to round whole numbers to the nearest 10 or 3.MP.5. Use appropriate tools strategically.100.(Sessions: All Unit) 3.MP.7. Look for and make use of structure.Connections: 3.OA.5; 3.SL.1; ET03-S1C4.01 3.MP.8. Look for and express regularity in repeated reasoning.Third Grade Underline =Tier 2 wordsInvestigation Unit 3Created on 11/30/2011 12:40 PM -1-
2. 2. Isaac School District, No. 5 Mathematics Curriculum Guide: Third GradeExplanations and ExamplesStudents learn when and why to round numbers. They identify possible answers and halfway points. Then they narrow where the given number falls between the possibleanswers and halfway points. They also understand that by convention if a number is exactly at the halfway point of the two possible answers, the number is rounded up.Example: Round 178 to the nearest 10. Step 1: The answer is either 170 or 180. Step 2: The halfway point is 175. Step 3: 178 is between 175 and 180. Step 4: Therefore, the rounded number is 180.Third Grade Underline =Tier 2 wordsInvestigation Unit 3Created on 11/30/2011 12:40 PM -2-