Lafayette Parish School System Curriculum Map Mathematics: Grade 4 Unit 7: Review/Extension of Place Value, Fractions, and More (LCC Units 7 and 8) Time frame: 20 School Days Unit 7 extends students’ understanding of place value by expressing numbers in standard, written, expanded, and verbal forms through 1,000,000. Money, multiplication and division algorithms, fractions, decimals and percent, as well as algebra are revisited in preparation for fifth grade math. Additionally, algebra concepts, particularly open/closed and true/false number sentence, and measures of central tendency close out this unit. Guided Questions 1. Can students tell how the value of a digit changes depending on the digit’s position or place in a number? 2. Can students read and write numbers through 1,000,000 in word, standard, and expanded forms? 3. Can students use objects and pictures to model and interpret models for numbers through 1,000,000? 4. Can students order numbers and use <, >, or = to compare numbers through 1,000,000? 5. Can students use manipulatives to demonstrate that a number is divisible by 2, 3, 5, or 10? 6. Can students interpret the range, mean, median, and mode of a set of data? 7. Can students rewrite products as the sum of two products to illustrate the distributive property of multiplication over addition? 8. Can students read, write, and interpret decimals through hundredths? 9. Can students give and identify the decimal equivalent of halves, fourths, and tenths? 10. Can students use set models, pictures, arrays, and regions to read, write, compare, order, identify, model, and represent fractions through twelfths? Vocabulary List Continue to develop previously introduced math vocabulary words in this unit, especially the ones students are having difficulty using correctly. Teacher Note All the GLEs have been taught prior to the LEAP test except taking place value to the millions; open/closed and true/false number sentences;; divisibility; and the distributive property. You are encouraged to use the rest of the school year to ensure mastery of grade 4 GLEs. Please, remember to include the GLEs in a problemsolving format. This will improve the students’ chances of passing the LEAP should they need to retest this summer. LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 61 Lafayette Parish School System Curriculum Map Mathematics: Grade 4 Unit 7: Review/Extension of Place Value, Fractions, and More Grade Level Expectations TLW be able to: Instructional Notes/Strategies Basic Facts: —continue daily until mastery 4. Know all basic facts for multiplication and division E through 12 x 12 and 144 12, and recognize factors of composite numbers less than 50 [as well as multiples of natural numbers for 2 through 12] (N1) (N6) (N7) Resources Students should have mastered basic facts by now. However, please continue to work with students who have not mastered their facts. See instructional notes/strategies from Units 1- 6 See resources list from Units1-6 Remind students that— comparisons are read from left to right. for example, 612 <6 18 must be read as 612 is less than 618, rather than 618 is greater than 612. ☛Harcourt— 1.3 (6-9) Bloom— Knowledge Focus 7-1: Place Value through 1,000,000 (3 Days) 1. I Read and write place value in word, standard, and expanded form through 1,000,000 (N1) Bloom—Comprehension associate place value words with how many digits in a number tell how the value of a digit changes because of its position/place in the number (tell the value of 5 in 95,836 and 9,577,836) read and write in word (six hundred thirty-two thousand), standard (632,000), and expanded form (600,000 + 30,000 + 2,000) through 1,000,000 ☛See resources list from Unit 1 although both statements are correct, remind students when comparing numbers, it is read from left to right LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 62 Lafayette Parish School System Curriculum Map Mathematics: Grade 4 Unit 7: Review/Extension of Place Value, Fractions, and More Grade Level Expectations 2. E Read, write, compare, and order whole numbers using place value concepts, standard notation, and models through 1,000,000 (N1) (N3) (A1) TLW be able to: Instructional Notes/Strategies model, compare, and order numbers ☛See instructional notes/strategies from Unit 1 Resources ☛See resources list from Unit 1 through 1,000,000 interpret models made from place value blocks and other concert or pictorial objects use < >, or = to compare numbers Bloom—Application Focus 7-2: Money, Divisibility, Distributive Property, Multiplication and Division Algorithms (5 Days) 12. E Count money, determine change, and solve simple word problems involving money amounts using decimal notation (N6) (N9) (M1) (M5) count money up to $100 determine change up to $50 solve simple word problems using See notes from Unit 1 See resources list from Unit 1 ☛ LCC Activities— Unit 1: Activity 3 If You Made a Million See notes from Unit 1 See resources list from Unit 3 decimal notations Bloom—Application 11. E Multiply 3-digit by 1-digit numbers, 2-digit by 2-digit numbers, and divide 3-digit numbers by 1-digit numbers, with and without remainders (N6) (N7) Bloom—Application fluently and accurately multiply up to 3-digit numbers by 1-digit numbers using the distributive property, standard algorithm, and place value fluently and accurately multiply 2-digit numbers by 2-digit numbers using the distributive property, standard algorithm, and place value concept fluently and accurately divide 3-digit numbers by 1-digit numbers with and without remainders using the standard algorithm and place value concept LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 63 Lafayette Parish School System Curriculum Map Mathematics: Grade 4 Unit 7: Review/Extension of Place Value, Fractions, and More Grade Level Expectations 3. C Illustrate with manipulatives when a number is divisible by 2, 3, 5, or 10 (N1) TLW be able to: Instructional Notes/Strategies use objects and pictures to prove that a number is divisible by 2, 3, 5, and 10 Bloom—Comprehension 17. C Use manipulatives to represent the distributive property of multiplication over addition to explain multiplying numbers (A1) (A2) use manipulatives represent and the distributive property of multiplication over addition Provide experiences so the students can discover that will allow them to discover and make permanent the knowledge that— ♦ numbers are divisible by 2 ♦ numbers ending in 0 are divisible by 10 ♦ numbers ending in 5 or 0 are divisible by 5 ♦ numbers divisible by 10 are divisible by 2 and 5 To distribute something means to hand it out Use coins to demonstrate the distributive property, such as 5 x (2 + 3) = (5 x 2) + (5 x 3) Take 25 pennies and make 5 stacks of 2 pennies and 5 stacks of 3 pennies Bloom—Comprehension This represents the right-hand side of the equation: five times two plus five times three or written mathematically: (5 x 2) + (5 x 3) Resources ☛Harcourt— 16.1 ( 336-337) ☛Project Lift —Focus 9, 12, 30, 25 ☛Linking Math— A39 ☛LCC Activities—See the Activity Alignment Document for ideas ☛Technology Connection—None Suggested ☛Harcourt— 11.2 ( 238-239); 9.3 ( 188-191) 9.4 ( 192-192) ☛Project Lift —None ☛Linking Math—C3 ☛LCC Activities— None Suggested ☛Technology Connection—None Suggested Now pair each stack of two pennies with a stack of three pennies. This represents the left side of the example: 5 groups, two plus three in each group [or written mathematically: 5 x (2 + 3] LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 64 Lafayette Parish School System Curriculum Map Mathematics: Grade 4 Unit 7: Review/Extension of Place Value, Fractions, and More Grade Level Expectations TLW be able to: Instructional Notes/Strategies Resources See instructional notes/strategies from Unit 1 Finding range and mode are the focus for fourth grade, however here is where you can expose them to mean and median. ☛Harcourt—6.2 (119 -121) [Exclude # 8] 6.3 (122-123) Focus 7-3: Measure of Central Tendency (4 Days) 35 I Find and interpret the meaning of [range], mean, mode, and median of a small set of numbers using (concrete objects) when the answer is a whole number (D1) use manipulatives to determine the range, mean, mode, and median of a small set of objects ☛LEAP Tutoring Guide—Pages 110B-113B ☛Technology— Focus 7-4: True or False, Open or Closed Number Sentences, and One-Step Equations (4 Days) 18. Identify and create true/false create and identify true and false C number sentences and open/closed number sentences (A2) create and identify open and closed number sentences Bloom—Synthesis Solve one-step equations with whole number solutions (A2) (N4) ☛Linking Math—A 40 ☛LCC Activities— Unit 7: Activity 10: Mouth-watering Math) and Unit 8: Activity 11 (What Does This Mean?) Bloom—Application 19. C ☛Project Lift—Focus 24/28 solve one-step equations involving addition, subtraction, and basic fact multiplication and division See instructional notes/strategies from Unit 2 ☛Harcourt—none ☛Project Lift—Focus7 ☛Linking Math—none ☛LCC Activities— Unit 5: Activity 12 (True or False) ☛LEAP Tutoring Guide—Pages 14A-17A ☛Technology—None Suggested See notes from Unit 1 ☛LCC Activities— Unit 8: Activity 3 (Guess Your Number) Bloom-- Application LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 65 Lafayette Parish School System Curriculum Map Mathematics: Grade 4 Unit 7: Review/Extension of Place Value, Fractions, and More Grade Level Expectations TLW be able to: Instructional Notes/Strategies Resources Focus 7-5: Model, Read, Write, Compare, Order, and Represent Fractions, Decimals, and Percent (4 Days) 6. E Model, read, write, compare, order, and represent fractions with denominators through twelfths using region and set models (N1) (A1) represent fractions that have denominators of 2 through 12 as parts of a whole, parts of a set, and points on the number line model, read, write, compare, and order fractions that have denominators of 2 through 12 See instructional notes/strategies from Unit 6 See resources list from Unit 6 use pictures, models, and diagrams to See instructional notes/strategies from Unit 6 See resources list from Unit 6 See instructional notes/strategies from Unit 6 See resources list from Unit 6 See instructional notes/strategies from Unit 6 See resources list from Unit 6 ☛LCC Activities— Activity 2 (Ordering Decimals) Bloom—Application 9. I Estimate fractional amounts through twelfths, using pictures, models, and diagrams (N2) Bloom—Application 5. I Read, write, and relate decimals through hundredths and connect them with corresponding decimal fractions (N1) estimate fractional amounts use models or pictures to identify equivalent fractions and to compare and order them read and write decimals through hundredths as fractions change and discuss common benchmark fraction to decimals, and vice versa Bloom—Comprehension 7. C Give decimal equivalents of halves, fourths, and tenths (N2) (N1) Bloom—Comprehension use models to show the decimal equivalents for halves, fourths, and tenths write fractions, decimals, and percents that name the same number, especially for halves, fourths, and tenths LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 ☛LCC Activities—Activity 6 (Fraction/Decimal/Percent Dominoes) and Activity 7(Professor Know-it-All) 66 ACTIVITIES FOR YOUR CONSIDERATION Activity 2: Ordering Decimals (GLEs: 5, 6) Materials List: zip-lock bags, plastic coins, index cards with decimals written on them, pencil Give each student the following money amounts and have them put them in order by value, starting with the smallest amount (10¢, 25¢, 75¢, 5¢, 50¢, 1¢, $1.00). Help them connect these amounts to the corresponding equivalent decimal by putting the decimal amounts under each money amount. Discuss how decimals are ordered. Explain the place value of decimals to the hundredths place. Next, explain that a decimal is another way of writing a fraction. Have the students state the equivalent fraction for given decimal amounts. Record their responses on the board. (.01 = 1/100, .05 = 5/100 or 1/20, .10 = 10/100 or 1/10, .25 = 25/100 or 1/4, .50 = 50/100 or 1/2, .75 = 75/100 or 3/4) Working in pairs, give students a zip-lock bag with three to four cards in it with a decimal amount on each card and its equivalent fraction. Have the students take out the cards and put them in order. Allow them to use their plastic coins if needed. Check for accuracy. Have students exchange bags and repeat the activity. Activity 3: If You Made a Million! (GLEs: 2, 4, 12, 14) *From Unit 1 Materials List: resources to find costs of items, (newspapers, magazines, or Internet access), calculator, pencil, paper, If You Made a Million by David M. Schwartz (optional) Students will create a story chain (view literacy strategy descriptions). Story chains are especially useful in teaching math concepts, while at the same time promoting writing and reading. Students can be creative and use information and math from their everyday life. To create this story chain, put students in groups of four. On a sheet of paper, ask the first student to write the opening sentence of the Math Chain Story, “If I had a Million Dollars I would...” (The first student will put what they would do or buy and how much it would cost.) The second student would use the calculator and subtract that amount. Next, he/she would continue the story by adding what they would do/buy. The third and fourth persons would do the same. They will continue in this manner until there is no more money. The students may use newspapers, magazines, or the computer to find the costs of different items they would buy “if they made a million.” Optional: Read and discuss the book, If You Made a Million by David M. Schwartz. (This book describes the various forms money can take, including coins, paper money and personal checks and how money can be used to make purchases pay off loans, or build interest in a bank.) LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 67 Activity 6: Fraction/Decimal/Percent Dominoes (GLEs: 6, 7, 9) Materials List: Fraction/Decimal/Percent Dominoes BLM, card stock Make a set of fraction/decimal/percent domino cards by running the Fraction/Decimal/Percent BLM on card stock. Run enough copies for students to work in pairs. Place all dominoes face down. Have each player choose three dominoes. Taking turns, have players place dominoes against other dominoes with equal value. If a player cannot make a play, he or she draws a domino from the pile until a play is possible. Play continues until one player has no more dominoes or until no more plays can be made. Activity 7: Professor Know-It-All (GLEs: 5, 7, 9) Materials list: index cards, pencils Students will work in groups of threes. They will choose a fraction through twelfths and record the fraction and its corresponding decimal and percent on an index card to be used to play professor know-it-all (view literacy strategy descriptions). One group will come to the front of the room and take on the role of “Professor.” Another group will read their fraction, decimal or percent. The Professor” group will have to state the two missing parts. Rotate groups of know-it-alls after 5 minutes to include all groups. Example: Group 1 has written Group 1 says, “75%.” Group 2 “The Professor” responds, ¾ and .75. Activity 10: Mouth-watering Math (GLEs: 5, 6, 7, 8, 9, 35, 36, 41) Materials List: color coated candy, crayons, paper, pencil Show students a spoonful of colored coated candy such as mini M&Ms®. Have them write down their estimate of the amount of candy in the spoon. Then have the class create a line plot of their estimates on the board. Discuss mean, mode, and median of the estimated data. Count candies to find the actual number of candies in the spoon. Make a new line plot with the actual data. Find the mean, mode, and median for the new data. Compare the estimated and actual data. Next, give each pair of students a small bag of the color coated candy and ask them to estimate the amount of candy in the bag, using the spoonful of candy as their benchmark. After recording their estimates, have them count the candy, record the actual amount of candy in the bag, and find the difference between their estimates and the actual amount. Have students classify the candy by color, record the fractional part of each color, and list the fractions in order from the least to the greatest. Have students construct a pie (circle) graph using 25 of the candies. Have them put the candies together in the circle by color. Make a legend showing that for this graph1 candy = 4% candies since a pie graph represents 100%. Then have each pair of students record the pie graph on a sheet of paper using the corresponding crayon that matches the candy. Have them draw the appropriate lines on the pie graph where one color begins. Have them write in each fractional part of the graph along with the corresponding decimal and percent amounts. Have them check that their graph contains all necessary parts-title, labels, scale, legend. Discuss why this type of graph is good to use when you are showing parts of a whole. Discuss other times a pie graph may be used. Have them write probability statements about each color of candy based on their graph. LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 68 Activity 11: What Does This Mean? (GLE: 35) *From Unit 8 Materials List: connecting cubes, paper, pencil Students are presented with five stacks of connecting cubes, two stacks that are 3 cubes high, one 6 cubes high, and two 4 cubes high. Ask students to determine the mode height, the median height, and the mean height for this set of data. Students will determine the mode by grouping the stacks according to height. The stacks with the same number of cubes in it that appears most often is the mode. Students will determine the median by putting the stacks in order from shortest to longest and then selecting the stack in the middle. (Keeping the number of stacks odd facilitates getting a whole number median.) Students will determine the mean by “leveling” the stacks. In this case, they could make all the stacks have 4 cubes. Allow the students to make up their own problems, using the cubes. Make sure students state the mean, mode, and median for each set of cubes they use. Activity 12: True or False (GLE: 4, 18) Materials List: paper, pencil, teacher-made cards with division sentences, extra index cards In preparation for the True or False game, have the students create a Divisibility Rules word grid (view literacy strategy descriptions). This activity will help students review the important concepts of the divisibility rules. It will also serve to reinforce prime and composite numbers. Have students generate three or four digit numbers to use for the word grid. Through student participation, fill in the word grid by placing “+” in the space of any divisibility rule that applies for that number and determine if that number is prime or composite. Next have the students work with a partner. Give one card from the set of cards with division sentences you created to each group. Students, working with a partner, read the sentence, then rewrite the sentence using math symbols when possible, state if the number sentence is true or false, and explain their reasoning. These activities should involve estimations where students have to determine if the estimation is appropriate and give a rationale for why or why not. LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 69 Examples of cards could include: • 57 divided by 4 is less than 57 The group writes 57 ÷ 4 < 57 The number sentence is true because when you divide 57 into 4 groups no group can have all 57 in it. • The remainder when 545 divided by 5 results in 5. The group writes 545 ÷ 5 =N with a remainder of 5 is not true because if you have 5 left you can divide the number one more time. (Or it is not true because 545 is a multiple of 5 so 545 can be evenly divided by 5. There would be no remainder.) • 9,578 is divisible by 2. • 2,467 is divisible by 2. • 578 divided by 8 is greater than 586 divided by 8. • 9 divided by 0 is 9. When students have completed these cards, they could make up a similar set of cards to exchange with another group and repeat the process. When the sets are completed, they would be returned to the original group to check. LPSS Comprehensive Curriculum 2011-2012 Grade 4: Mathematics Unit 7 70