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Fraction action!222

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A tutorial on fractions for third graders

Publicada em: Educação, Tecnologia
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Fraction action!222

  1. 1. A Tutorial for Third Graders<br />By Helen Carbonneau<br />EDUC 6305 <br />July 2011<br />Fraction Action!!<br />
  2. 2. Part one: Would You Recognize a Fraction?<br />?<br />?<br />?<br />
  3. 3. Which of these is a fraction?<br />5/3<br />3/5<br />5/5<br />All of the above<br />
  4. 4. Which one is a fraction?<br />5/3<br />3/5 <br />5/5<br />All of the above<br />(Keep reading. Fractions are easier to understand when you can see them.)<br />Surprise!!<br />
  5. 5. Really, you already know a lot about fractions. Here are some common objects that are fractionalized…<br />
  6. 6. Each slice is a fraction of the pizza.<br />
  7. 7. Each segment is a fraction of the candy bar.<br />
  8. 8. Each brick is a fraction of the wall.<br />
  9. 9. We don’t always use the word “fraction”. Sometimes we just divide things.<br />
  10. 10. “Fraction” is the math word. But there are other words that mean the same thing:<br />A small piece<br />A slice<br />A little bit<br />Most of it<br />A share of<br />The lion’s share<br />A portion of<br />Leftovers and remainders<br />
  11. 11. A fraction is part of something larger. That larger thing is called the “whole” or the “unit”.<br />
  12. 12. Did you like that picture?<br />Here it is again…<br />
  13. 13. This is the wholedoughnut.<br />
  14. 14. Here are the fractions. Two halves of the whole doughnut. <br />
  15. 15. Fractions can also be part of a set.<br />There are 12 candies in this set. 2 of the 12 are red. 2 of the 12 are yellow. 2 are blue. 2 of the 12 are green. 2 of the 12 are orange and the other 2 are brown.<br />The fraction is:<br />2/12.<br />
  16. 16. Fractioning is breaking up or splitting up. To fraction something is to break it apart.<br />
  17. 17. It can be broken up even more.<br />
  18. 18. It can still be broken up again.<br />
  19. 19. Fractioning can occur many, many times. No matter the size, all the pieces are fractions.<br />
  20. 20. We use numbers to show the division. These fractions are mathematical expressions.<br />½<br /> ¾<br /> 5/8<br /> 10/16<br />5/4<br /> 999/1000<br />
  21. 21. Other words for fractions and whole:<br />Full- half full- empty<br />Percentages <br />Decimals<br />Unit and segments <br />
  22. 22. Coins are fractions of dollars.<br />
  23. 23. End of Part One<br />Cooperative group assignment: In your group, read about “Animal Clutches” on p. 218 in your Student Reference Book. <br />In journals, write three observations about animal clutches. Bring Reference Books and Journals to Math group.<br />In Math group, complete a parts-and-total chart using data from “Animal Clutches”.<br />Assessment: At your desk, complete Math Boxes in Student Math Journal, p. 36.<br />
  24. 24. Part Two: The Fractions<br />
  25. 25. Fractioning is breaking up a whole.<br />
  26. 26. Some fractional parts have names.<br />Half ½ Third 1/3 <br />Fourth ( or quarter) 1/4                  <br />One fifth 1/5<br /> Three quarters 3/4                   <br />      <br />
  27. 27. Money fractions have these names:<br />Cent or penny (1 ¢)<br />Nickel (5 ¢)<br />Dime (10 ¢)<br />Quarter (25 ¢)<br />Half Dollar (50 ¢)<br />
  28. 28. Remember: The fractions are equal parts of the whole.<br />
  29. 29. In math, we refer to the whole unit as an integer.<br />
  30. 30. Fractions are written like this. <br />The top number is the numerator.<br />The bottom number is the denominator.<br />⅚<br />
  31. 31. The denominator is downstairs.<br /> 9/10<br />Denominator<br />
  32. 32. The numerator is in the attic.<br />9/10<br />Numerator<br />
  33. 33. The fraction tells how many pieces of a whole unit we are dealing with.<br />5/6<br />2/3<br />
  34. 34. End of Part 2<br />Journaling activity: Use geometry blocks (2 colors)to construct fractional models. Refer to the instructions at the table.<br />Assessment: At your desk, write a paragraph in your journal about what your understanding of fractions.<br />
  35. 35. Part three: Fun Fraction Sites<br />
  36. 36. Here are some great sites for kids to learn more about fractions.<br />This was just the beginning. There is much more to learn about fractions. <br />These sites will help you to practice.<br />“What are Fractions?”<br />http://tinyurl.com/6glkx64<br />“Fraction Dominoes” http://tinyurl.com/6h38eh8<br />“Fractions” tutorial http://tinyurl.com/ax9wb<br />
  37. 37. More Fraction Sites for Kids<br />“Adding Fractions with Like Denominators” http://tinyurl.com/5tcntat<br />“Subtracting Fractions with Like Denominators” http://tinyurl.com/633rwp9<br />“Comparing Fractions” http://tinyurl.com/658wxd9<br />
  38. 38. More Fractions Sites for Kids<br />“Visual Fractions” http://www.visualfractions.com/<br />“Fresh Baked Fractions” http://tinyurl.com/8d54a<br />
  39. 39. West Virginia CSO reference<br />M.O.3.1.5 <br />demonstrate an understanding of fractions as part of a whole/one and as part of a set/group using models and pictorial representations.<br />Source: http://tinyurl.com/6camqbz<br />