1 / 13

Understanding Fraction Representations Session 3

Understanding Fraction Representations Session 3. Amy LeHew Elementary Math Facilitator Meeting November 2012. Agenda. What is the MOST EFFECTIVE way to I ntroduce fractions on a number line? Build understanding of fractions as a number on a number line?. Math Task.

aren
Download Presentation

Understanding Fraction Representations Session 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Understanding Fraction RepresentationsSession 3 Amy LeHew Elementary Math Facilitator Meeting November 2012

  2. Agenda What is the MOST EFFECTIVE way to • Introduce fractions on a number line? • Build understanding of fractions as a number on a number line?

  3. Math Task • Draw a number line from 0 to 5 • Place the number ¾ on your number line. • How do you think your 3rd, 4th, 5th graders would solve this?

  4. California Mathematics Project Task Force • Asked 3rd- 4th -5th grade students to write 7/8 on a number line from 0-8. • Guess where they put it? • Why would they place 7/8between 7 and 8?

  5. I wonder what would happen in CMS… Take a look at the student samples at your table. What evidence do you see of Misconceptions Understandings?

  6. Here’s What they Said

  7. “You can’t have the number line without fractions; you can’t have fractions without a number line. Number lines are not optional.” Phil Daro, January 2011 Wu asserted that ‘The number line is to fractions what one’s fingers are to whole numbers…’”

  8. Enough Talking! We have 10 additional days added to Unit 7 You’ve been collaborating with peers around fraction representations, the Common Core, and Number Lines I am not writing these lessons… WE ARE  How is a unit written anyway?

  9. Review Unit 7 for 3rd grade to get a sense of- the work students will do- the standards addressed-connections that could be made to number lines.In Georgia Measurement unit, students had 1 experience collecting shoe size and measuring shoe length with cubes (just to get them thinking about measurement and data).

  10. Create a 10-Day Plan Goal: by the end of the 2 weeks students will own the number line and see fractions as numbers on number lines. Your plan must include lessons for… • Folding (partitioning lengths) • Measuring and plotting lengths to nearest half and quarter inch • Finding equivalent fractions on a number line • *Have NF standards and MD.4 standard written all over them!

  11. Create a 10-Day Plan Resources around the Room: • Reading materials • Assessment items • Activities • Lessons • Student Work Your plan must include lessons for… • Folding (partitioning lengths) • Measuring and plotting lengths to nearest half and quarter inch • Finding equivalent fractions on a number line • Be thoughtful • Be critical

  12. 3.MD.4. Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units— whole numbers, halves, or quarters. Develop understanding of fractions as numbers. 1. Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b. 2. Understand a fraction as a number on the number line; represent fractions on a number line diagram. Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line. Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line. 3. Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size. a. Understand two fractions as equivalent (equal) if they are the same size, or the same point on a number line. b. Recognize and generate simple equivalent fractions, e.g., 1/2 = 2/4, 4/6 = 2/3). Explain why the fractions are equivalent, e.g., by using a visual fraction model. c. Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers. Examples: Express 3 in the form 3 = 3/1; recognize that 6/1 = 6; locate 4/4 and 1 at the same point of a number line diagram. d. Compare two fractions with the same numerator or the same denominator by reasoning about their size. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with the symbols >, =, or <, and justify the conclusions, e.g., by using a visual fraction model.

  13. Homework (actually, schoolwork) • What questions might we all ask 10 third grade students to get a sense of where they are with number line work? • ASK at least 5 students at your school and bring back video and/or paper evidence!

More Related