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# Unit 7 Fourth Grade 2012 2013

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### Unit 7 Fourth Grade 2012 2013

1. 1. Isaac School District, No. 5 Mathematics Curriculum Guide: Fourth Grade Unit 7 Moving Between Solids and Silhouettes: 3-D Geometry and Measurement Total Sessions: 7Big Ideas: Essential Questions:Students will understand that:  Why is it important to have an understanding of the attributes  Geometric figures can be described and grouped by their attributes. of 2-dimensional figures?  Mathematical information is used to justify reasoning.  What is the relationship between geometric attributes?  There is a relationship between geometric attributes.  How might you classify a group of geometric figures?  Nets represent a 3-dimensional geometric figure.  What makes me think that my reasoning is correct?  What is the relationship between a 3-dimensional figure and its net?Unit Vocabulary: prism, cylinder, solid, vertex, edge, face, silhouette, volume, regular prism Domain: Number and Operations in Base Ten (NBT) (Grade 4 expectations in this domain are limited to whole numbers less than or equal to 1,000,000.) Mathematical Practices Mathematical Practices Cluster: Generalize place value understanding for multi-digit whole numbers.Students are expected to: 4.NBT.2. Read and write multi-digit whole numbers using base-ten numerals, number 4.MP.2. Reason abstractly and quantitatively.names, and expanded form. Compare two multi-digit numbers based on meanings ofthe digits in each place, using >, =, and < symbols to record the results of 4.MP.4. Model with mathematics.comparisons.(Sessions: 3.5A / 3.5B) 4.MP.6. Attend to precision.Connections: 4.NBT.1 4.MP.7. Look for and make use of structure.Explanations and ExamplesThe expanded form of 275 is 200 + 70 + 5. Students use place value to compare numbers. For example, in comparing 34,570 and 34,192, a student might say, both numbershave the same value of 10,000s and the same value of 1000s however, the value in the 100s place is different so that is where I would compare the two numbers.Fourth Grade Underline= Tier 2 wordsInvestigation Unit 7Created on 2/4/2012 11:46 AM -1-
2. 2. Isaac School District, No. 5 Mathematics Curriculum Guide: Fourth Grade Domain: Number and Operations—Fractions (NF) (Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12 and 100.) AZ Math Standards AZ Math Standards Cluster: Understand decimal notation for fractions, and compare decimal fractions.Students are expected to: 4.NF.7. Compare two decimals to hundredths by reasoning about their size. 4.MP.2. Reason abstractly and quantitatively.Recognize that comparisons are valid only when the two decimals refer to the samewhole. Record the results of comparisons with the symbols >, =, or <, and justify the 4.MP.4. Model with mathematics.conclusions, e.g., by using a visual model.(Sessions: 3.1-3.2) 4.MP.5. Use appropriate tools strategically.Connections: 4.RI.7; 4.SL.1b; 4.SL.1c; 4.SL.1d; ET04-S1C2-02 4.MP.7. Look for and make use of structure.Explanations and ExamplesStudents build area and other models to compare decimals. Through these experiences and their work with fraction models, they build the understanding that comparisonsbetween decimals or fractions are only valid when the whole is the same for both cases. Each of the models below shows 3/10 but the whole on the right is much bigger than thewhole on the left. They are both 3/10 but the model on the right is a much larger quantity than the model on the left.When the wholes are the same, the decimals or fractions can be compared.Example:  Draw a model to show that 0.3 < 0.5. (Students would sketch two models of approximately the same size to show the area that represents three-tenths is smaller than the area that represents five-tenths.Fourth Grade Underline= Tier 2 wordsInvestigation Unit 7Created on 2/4/2012 11:46 AM -2-
3. 3. Isaac School District, No. 5 Mathematics Curriculum Guide: Fourth Grade Domain: Measurement and Data (MD) AZ Math Standards Mathematical PracticesCluster: Solve problems involving measurement and conversion of measurements from a larger unit to a smaller unit.Students are expected to:4.MD.1. Know relative sizes of measurement units within one system of units including 4.MP.2. Reason abstractly and quantitatively.km, m, cm; kg, g; lb, oz.; l, ml; hr, min, sec. Within a single system of measurement,express measurements in a larger unit in terms of a smaller unit. Record measurement 4.MP.5. Use appropriate tools strategically.equivalents in a two-column table. For example, know that 1 ft is 12 times as long as 1in. Express the length of a 4 ft snake as 48 in. Generate a conversion table for feet and 4.MP.6. Attend to precisioninches listing the number pairs (1, 12), (2, 24), (3, 36),(Sessions: 3.5A / 3.5B)Connections: 4.OA.5; 4.NBT.5; ET04-S1C2-01; ET04-S1C2-02Explanations and ExamplesThe units of measure that have not been addressed in prior years are pounds, ounces, kilometers, milliliters, and seconds. Students’ priorexperiences were limited to measuring length, mass, liquid volume, and elapsed time. Students did not convert measurements. Students needample opportunities to become familiar with these new units of measure.Students may use a two-column chart to convert from larger to smaller units and record equivalent measurements. They make statements suchas, if one foot is 12 inches, then 3 feet has to be 36 inches because there are 3 groups of 12.Example: kg g ft in lb oz 1 1000 1 12 1 16 2 2000 2 24 2 32 3 3000 3 36 3 48Fourth Grade Underline= Tier 2 wordsInvestigation Unit 7Created on 2/4/2012 11:46 AM -3-
4. 4. Isaac School District, No. 5 Mathematics Curriculum Guide: Fourth GradeStudents are expected to:4.MD.2. Use the four operations to solve word problems involving distances, 4.MP.1. Make sense of problems and persevere in solving them.intervals of time, liquid volumes, masses of objects, and money, includingproblems involving simple fractions or decimals, and problems that require 4.MP.2. Reason abstractly and quantitatively.expressing measurements given in a larger unit in terms of a smaller unit.Represent measurement quantities using diagrams such as number line 4.MP.4. Model with mathematics.diagrams that feature a measurement scale.(Sessions: 3.5B) 4.MP.5. Use appropriate tools strategically.Connections: 4.OA.2; 4.OA.3; 4.NBT.4; 4.NF4.a; 4.NF.4c; 4.RI.5; 4.RI.7; 4.W.2e;ET04-S1C4-01 4.MP.6. Attend to precision.Explanations and ExamplesDivision/fractions: Susan has 2 feet of ribbon. She wants to give her ribbon to her 3 best friends so each friend gets the same amount. How much ribbon will each friend get?Students may record their solutions using fractions or inches. (The answer would be 2/3 of a foot or 8 inches. Students are able to express the answer in inches because theyunderstand that 1/3 of a foot is 4 inches and 2/3 of a foot is 2 groups of 1/3.)Addition: Mason ran for an hour and 15 minutes on Monday, 25 minutes on Tuesday, and 40 minutes on Wednesday. What was the total number of minutes Mason ran?Subtraction: A pound of apples costs \$1.20. Rachel bought a pound and a half of apples. If she gave the clerk a \$5.00 bill, how much change will she get back?Multiplication: Mario and his 2 brothers are selling lemonade. Mario brought one and a half liters, Javier brought 2 liters, and Ernesto brought 450 milliliters. How many totalmilliliters of lemonade did the boys have?Number line diagrams that feature a measurement scale can represent measurement quantities. Examples include: ruler, diagram marking off distance along a road with cities atvarious points, a timetable showing hours throughout the day, or a volume measure on the side of a container.Fourth Grade Underline= Tier 2 wordsInvestigation Unit 7Created on 2/4/2012 11:46 AM -4-