1. MODULE 2 Measuring using centimeter rulers and meter sticks and making estimations

2. Fluency PracticeFluency Practice Related Facts on a RulerRelated Facts on a Ruler Find 3 on the ruler you made yesterday.Find 3 on the ruler you made yesterday. Raise your hand when you know 8 more than 3.Raise your hand when you know 8 more than 3. Ready? 11! Give me a number sentence starting with 3 thatGive me a number sentence starting with 3 that shows 8 more.shows 8 more. 3+8=11 Put your finger on 11. Raise your hand when youPut your finger on 11. Raise your hand when you know 3 less than 11.know 3 less than 11. 11-3=8 8! What is the number sentence?What is the number sentence? Give a number sentence to show 8 less than 11Give a number sentence to show 8 less than 11 11-8=3

3. Fluency PracticeFluency Practice Find 2 on the ruler you made yesterday.Find 2 on the ruler you made yesterday. Raise your hand when you know 9 more than 2.Raise your hand when you know 9 more than 2. Ready? 11! Give me a number sentence starting with 2 thatGive me a number sentence starting with 2 that shows 9 more.shows 9 more. 2+9=11 Put your finger on 11. Raise your hand when youPut your finger on 11. Raise your hand when you know 2 less than 11.know 2 less than 11. 11-2=9 9! What is the number sentence?What is the number sentence? Give a number sentence to show 8 less than 11Give a number sentence to show 8 less than 11 11-9=2

4. Fluency PracticeFluency Practice Find 4 on the ruler you made yesterday.Find 4 on the ruler you made yesterday. Raise your hand when you know 9 more than 4.Raise your hand when you know 9 more than 4. Ready? 13! Give me a number sentence starting with 4 thatGive me a number sentence starting with 4 that shows 9 more.shows 9 more. 4+9=13 Put your finger on 13. Raise your hand when youPut your finger on 13. Raise your hand when you know 4 less than 13.know 4 less than 13. 13-4=9 9! What is the number sentence?What is the number sentence? Give a number sentence to show 4 less than 13Give a number sentence to show 4 less than 13 13-9=4

5. Fluency PracticeFluency Practice Find 6 on the ruler you made yesterday.Find 6 on the ruler you made yesterday. Raise your hand when you know 9 more than 6.Raise your hand when you know 9 more than 6. Ready? 15! Give me a number sentence starting with 6 thatGive me a number sentence starting with 6 that shows 9 more.shows 9 more. 6+9=15 Put your finger on 15. Raise your hand when youPut your finger on 15. Raise your hand when you know 6 less than 15.know 6 less than 15. 15-6=9 9! What is the number sentence?What is the number sentence? Give a number sentence to show 9 less than 15Give a number sentence to show 9 less than 15 15-9=6

6. Application ProblemApplication Problem Ethan has 8 fewer cards than Tristan. Tristan has 50 playingEthan has 8 fewer cards than Tristan. Tristan has 50 playing cards. How many playing cards does Ethan have? cards. How many playing cards does Ethan have? T E 50T E ? 8 50-8= Ethan has 42Ethan has 42 playing cards.playing cards. 50-8= 40 1040 10 10-8=2 40+2=42 Ethan has 42 playing cards.Ethan has 42 playing cards.

7. Concept DevelopmentConcept Development Put your pinky on a centimeter space. Would you say it’s aboutPut your pinky on a centimeter space. Would you say it’s about the same width as the centimeter cube?the same width as the centimeter cube? How could you use your pinky to estimate length?How could you use your pinky to estimate length? Let’s try using our pinkies to measure the lid of your marker.Let’s try using our pinkies to measure the lid of your marker. Turn to your neighbor and share your estimateTurn to your neighbor and share your estimate Lets check to see how close we were with our centimeter rulersLets check to see how close we were with our centimeter rulers

8. Concept DevelopmentConcept Development Measure your finger using your ruler. About how many centimetersMeasure your finger using your ruler. About how many centimeters long is your finger?long is your finger? Lets try using our finger to measure how long our book box is.Lets try using our finger to measure how long our book box is. Turn to your neighbor and compare your estimates.Turn to your neighbor and compare your estimates. Lets check to see how close we were with our centimeter rulersLets check to see how close we were with our centimeter rulers

9. Concept DevelopmentConcept Development Lets pretend we were building this school. I want to measure theLets pretend we were building this school. I want to measure the floor to see how long our carpet should be.floor to see how long our carpet should be. Can someone bring a ruler up from yesterday to measure the carpet?Can someone bring a ruler up from yesterday to measure the carpet? This ruler isn’t very big. It could take us a long time to measureThis ruler isn’t very big. It could take us a long time to measure the entire length of the floor.the entire length of the floor. Maybe we can use this tool instead!Maybe we can use this tool instead! How many centimeter rulers can we fit on this tool?How many centimeter rulers can we fit on this tool? about 5 centimeter rulers!about 5 centimeter rulers! We can say this tool is about 5 centimeter rulers long.We can say this tool is about 5 centimeter rulers long.

10. Concept DevelopmentConcept Development This tool is called a meter stick. It is 100 centimeters longThis tool is called a meter stick. It is 100 centimeters long We use a meter stick the same way we use a ruler.We use a meter stick the same way we use a ruler. When we are measuring things that are more than 100 centimeters,When we are measuring things that are more than 100 centimeters, we can measure in meters.we can measure in meters. Lets measure that floor now.Lets measure that floor now. I also have this tool.I also have this tool. What could I measure using this tool that I couldn’t measure withWhat could I measure using this tool that I couldn’t measure with the meter stick? the meter stick? Anything round or curved!Anything round or curved!

11. Concept DevelopmentConcept Development If I want to measure the door, should I use a centimeter ruler or the meter stick?If I want to measure the door, should I use a centimeter ruler or the meter stick? The hight of your desk? Make an estimation.The hight of your desk? Make an estimation. The length of the room? Make an estimation.The length of the room? Make an estimation. The length of the bookcase? Make an estimation.The length of the bookcase? Make an estimation. Your height? Make an estimation.Your height? Make an estimation. My height? Make an estimation.My height? Make an estimation. The length of the whiteboard? Make an estimation.The length of the whiteboard? Make an estimation. The hight of your book box? Make an estimation.The hight of your book box? Make an estimation.

12. Problem SetProblem Set

16. Student DebriefStudent Debrief - Which things did you measure in centimeters? Why? Which things did you measure in meters? Why? - Did you or your partner disagree on any of the measurement tools you selected? Defend your choice. - How do the size and shape of what we measure tell us which tool is most appropriate? - What new vocabulary did we earn today?- What new vocabulary did we earn today? - How many mental benchmarks can you name?- How many mental benchmarks can you name? - How do mental benchmarks help us? When is a good time to use them?