Comparing Two Objects Length Click to return to Table of Contents - PDF document

Slide 1 / 157 Slide 2 / 157 1st Grade Length 2015-11-30 www.njctl.org Slide 3 / 157 Slide 4 / 157 click on the topic to go Table of Contents to that section Standards for Mathematical Practices Comparing Two Objects MP 1 Make sense of problems and persevere in solving them. Comparing Three Objects Ordering Three Objects MP 2 Reason abstractly and quantitatively. Using Blocks to Measure MP 3 Construct viable arguments and critique the reasoning of others. Lab: Comparison Game MP 4 Model with mathematics. Using Blocks to Measure Pt. 2 MP 5 Use appropriate tools strategically. Classroom Items to Measure Lab: Measure Up MP 6 Attend to precision. Using a "Ruler" to Measure MP 7 Look for and make use of structure. Lab: Measuring with a "Ruler" MP 8 Look for and express regularity in repeated reasoning. Using Our Body to Measure Measuring in Feet Click on each standard to bring you to an example of how to meet Lab: Foot Measuring this standard within the unit. Slide 5 / 157 Slide 6 / 157 What is Length? Length is the distance from one end to the other. Comparing Two Objects Length Click to return to Table of Contents

Slide 7 / 157 Slide 8 / 157 Comparing 2 objects Which pencil is longer? When measuring, objects can be the same length A. B. One can be shorter or longer than the other, than the other. Shorter Longer Slide 9 / 157 Slide 10 / 157 Comparing Objects How about now? When comparing two objects, first line up the ends, and then look at the other end to see which one goes further. A. B. Start Why does A look longer than B? Slide 11 / 157 Slide 12 / 157 Which foot is longer? Which rope is shorter? What is the easiest way to find out? Start Start

Slide 13 / 157 Slide 14 / 157 2 Which line is longer? A B Slide 15 / 157 Slide 16 / 157 3 Two snakes where spotted in the woods. 4 Is the truck longer than the car? The longer snake was red. Which snake is Yes red? No A B Slide 17 / 157 Slide 18 / 157 5 When measuring two objects, we should line up the ends. Yes No

Slide 19 / 157 Slide 20 / 157 Ruler Hunt Have students use a 12 inch ruler and send them on a mission to find one thing in the classroom that is about the same size as the ruler, discuss the results and then repeat for objects that are shorter than the ruler and longer than the ruler. Slide 21 / 157 Slide 22 / 157 Comparing Objects Which truck is longer? Which truck is shorter? Comparing Three Objects Start Click to return to Table of Contents What is the first thing you need to do to have an accurate comparison? Slide 23 / 157 Slide 24 / 157 Comparing 3 Objects We can compare three objects the same way as two objects. Line up the end of the objects and look to see which one is longer. A B C Which rope is the longest? Which rope is the shortest?

Slide 25 / 157 Slide 26 / 157 Which tree is the shortest? Slide 27 / 157 Slide 28 / 157 6 Dad needed the longest screw for a project. Class Discussion Which screw did dad pick? A paint brush is shorter than a screwdriver. The screwdriver is A shorter than the hammer. Is the hammer shorter or longer than the paint brush? Draw a picture or use words to explain your answer. B C Slide 29 / 157 Slide 30 / 157 7 Which pen is the longest? 8 Which paperclip is the longest? A A B B C C

Slide 31 / 157 Slide 32 / 157 9 A bird built a nest in the tallest tree. Which tree is the bird's nest in? A B C Slide 33 / 157 Slide 34 / 157 Slide 35 / 157 Slide 36 / 157 Which boat is the longest? Ordering Three Objects Click to return to Table of Contents

Slide 37 / 157 Slide 38 / 157 Which child is the shortest? Put the Worms in Order Arrange the children from shortest to tallest. Write a 1, 2, or 3 to put the worms in order from shortest to longest. Then go from tallest to shortest. What did you notice about the order each time? Slide 39 / 157 Slide 40 / 157 Put the Trees in Order 11 Which two rows have the objects in order Put the trees in order from tallest to shortest. from tallest to shortest? A B These trees are close to the same height. C How can you check to be sure which is the tallest? Slide 41 / 157 Slide 42 / 157 12 Ken said the cars are in order from shortest 13 The ants are in order from tallest to to longest. Is he correct? shortest. Yes True No False

Slide 43 / 157 Slide 44 / 157 14 Jamie saw three worms crawling on the sidewalk. They were in order from longest to shortest. Which row is the row that Jamie saw? A B C Quiz Slide 45 / 157 Slide 46 / 157 Using Blocks to Measure Click to return to Table of Contents Slide 47 / 157 Slide 48 / 157 Using Blocks Since connecting cubes are all the same length, we can use them to measure an object. 8 7 6 5 4 3 2 1 This boy is 8 cubes tall.

Slide 49 / 157 Slide 50 / 157 Using Blocks It is also important to make sure the end of each block touches the end of the next block. Slide 51 / 157 Slide 52 / 157 Using Blocks Use the blocks to measure the building. Slide 53 / 157 Slide 54 / 157 Using Blocks Using Blocks Use the blocks to measure the girl to her fingertips. Use the blocks to measure the tree.

Slide 55 / 157 Slide 56 / 157 Using Blocks Use the blocks to measure the truck's length. Slide 57 / 157 Slide 58 / 157 School Supply Measurements Using Blocks Have students use connecting cubes to measure: Use the blocks to measure the rope. 1 - scissors 2 - an unsharpened pencil 3 - a crayon 4 - a folder 5 - their desk (work with a partner) Slide 59 / 157 Slide 60 / 157 16 Which snake is 4 blocks long? A B

Slide 61 / 157 Slide 62 / 157 17 Which tree is 6 blocks tall? 18 Beth bought a new couch. How long is her couch? A B Slide 63 / 157 Slide 64 / 157 Lab: Comparison Game 19 How long is the boot? - Split the children into groups of three. - Have each child roll a die. - Use connecting cubes to build a train using the same number of cubes as their roll. - Compare the size of the trains and the player with the longest train gets 1 point. 1 2 3 4 5 6 7 8 9 10 11 - Play until someone gets 10 points. Click to return to Table of Contents Slide 65 / 157 Slide 66 / 157

Slide 67 / 157 Slide 68 / 157 Using Blocks Use the blocks to measure the door. Using Blocks to Measure Pt. 2 Click to return to Table of Contents Slide 69 / 157 Slide 70 / 157 Using Blocks Using Blocks Use the blocks to measure the couch. When blocks do not connect, it is important to still make sure that the ends touch. But, make sure they do not over lap. Correct Incorrect Slide 71 / 157 Slide 72 / 157 Using Blocks Using Blocks If we left gaps between the blocks, What is wrong with this measurement? The boy is 5 blocks tall. the boy would only be 4 blocks tall which is not true.

Slide 73 / 157 Slide 74 / 157 Using Blocks Using Blocks Use the blocks to measure the building. If we placed the blocks on top of each other, the boy would be 6 blocks tall which is not true. Slide 75 / 157 Slide 76 / 157 Using Blocks Using Blocks Use the blocks to measure the house. Use the blocks to measure the foot. Slide 77 / 157 Slide 78 / 157 Using Blocks Using Blocks Use the blocks to measure the rocket. Use the blocks to measure the height of the slide.

Slide 79 / 157 Slide 80 / 157 Using Blocks Use the blocks to measure how far away the dog's bowl is from the dog. If the dog's owner moved the bowl back two blocks, how far away would it be? Slide 81 / 157 Slide 82 / 157 Using Blocks Using Blocks The green train below is 4 blocks shorter than a red train. Sally bought the rug below for her kitchen. How long is the red train? She bought a rug that is 1 block longer for her family room. How long is the rug in the family room? Slide 83 / 157 Slide 84 / 157 Classroom Hunt Class Discussion Have students use their blocks to find items around the classroom that are: Kyle's pencil is 6 blocks long. Ben's pencil is 2 blocks longer than Kyle's. How long is Ben's pencil? Explain. - 5 blocks long - 8 blocks tall - 15 blocks long - 4 blocks tall

Slide 85 / 157 Slide 86 / 157 20 Is the dog 6 blocks long? 21 Is the girl more than 2 blocks tall? Yes Yes No No Slide 87 / 157 Slide 88 / 157 22 How long is the train? 23 How tall is the tree? Slide 89 / 157 Slide 90 / 157

Slide 91 / 157 Slide 92 / 157 Classroom Items to Measure Click to return to Table of Contents Slide 93 / 157 Slide 94 / 157 Measurement Tools Use the erasers to measure the van. Slide 95 / 157 Slide 96 / 157

Slide 97 / 157 Slide 98 / 157 Slide 99 / 157 Slide 100 / 157 25 Is the rope 4 erasers long? Yes No Slide 101 / 157 Slide 102 / 157 27 Tyler measured his toy truck with his glue sticks. How many glue sticks long is his truck?

Slide 103 / 157 Slide 104 / 157 Lab: Measure Up 29 How many pencils long is the dresser? A creative measurement activity using non- standard measurement tools Click for more information. Click to return to Table of Contents Slide 105 / 157 Slide 106 / 157 Slide 107 / 157 Slide 108 / 157 Preparing for This Lesson Use the back of a ruler or paint stick and tape a strip of paper with stars on it (see handouts). The children will Ruler use this stick to measure different items. Click to return to Table of Contents