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Something to Think About

Something to Think About. What are good activities for helping students to learn their basic facts?. Secondary Numeracy Project. Fraction, Decimal, Percents. Fraction Constructs. Fractions are needed when whole units are inadequate to get a job done. Part-Whole: continuous & discrete.

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Something to Think About

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  1. Something to Think About • What are good activities for helping students to learn their basic facts?

  2. Secondary Numeracy Project Fraction, Decimal, Percents

  3. Fraction Constructs • Fractions are needed when whole units are inadequate to get a job done. • Part-Whole: continuous & discrete

  4. Continuous fraction model • Fractions are met as cutting up an entire object • e.g. one quarter of an apple • This single object soon extends to multiple objects to be shared • e.g. sharing two apples between 5 people • Leads to the concept that fractions are divisions • e.g.

  5. Discrete fraction model • Fractions are met through sharing a collection of objects • e.g. 4 kids share 12 cookies • Problems initially lead to discrete, whole number answers • Later problems merge with the continuous as “remainder” objects are cut • e.g. 4 kids share 10 cookies

  6. Handout: A Teaching Progression for Fractions • Stages – Continous & Discrete • Any surprises? • Look at Knowledge & Strategy Tests

  7. Knowledge Test: Fractions • Stage 4 (3 sec) 9: Write one half as a fraction. 10: Write one sixth as a fraction 11: Write one third as a fraction 12: Write one quarter as a fraction • Stage 5 (5 sec) 13: Which of these fractions is the smallest? 14: Which of these fractions is the largest?

  8. Stage 6 (5 sec) 15: Which of these numbers is the same as eight-sixths? • Stage 7 (5 sec) 16: Which of these fractions is the same as two-thirds? 17: Which of these fractions is the same as three-quarters?

  9. Stage 8 18: Which of these fractions is the smallest? (10 sec) 19: Which of these fractions is the largest? (10 sec)

  10. Strategy Test: Fractions • Stage 2-4 (materials)/Stage 5 (facts): This cake has been cut into thirds. Here are twelve jellybeans to spread out evenly on top of the cake. You eat one third of the cake. How many jellybeans do you eat?

  11. Stage 6: • What is of 28? • Stage 7: • 12 is of a number. What is the number? • Stage 8: • There are 21 boys and 14 girls in Ana’s class. What percentage of Ana’s class are boys? • It takes 10 balls of wool to make 15 beanies. How many balls of wool does it take to make 6 beanies?

  12. SNP Teaching Model Use a concrete representation (Materials/Diagrams) Encourage imaging and visualisation (Imaging) Push to the inherent property and generalisation (Abstraction) How can we use this with fractions?

  13. Fraction Strips • Work in groups of 8 • To start each person has a different colour paper • Fold paper in eighths – make sure everyone folds the same direction so that all eighths are the same size • Cut 1/8 strips (along fold lines) • Share out your strips so that everyone ends up with 8 strips of eight different colours • Cut strips as directed to match magnets

  14. Uses of fraction strips • Order unit fractions and fractions with the same denominator and explain why they are larger or smaller • Which is bigger? Why? • Order fractions visually using materials, including improper fractions and explain what the numerator and denominator mean. • Make pairs of fractions. Which is bigger?

  15. Which is the bigger fraction? • Many students miss the comparative nature of fractions – the relationship between the numerator and denominator. (Some research suggests that the failure to understand this is a reason why students have difficulty with fractions)

  16. Complexifying the constructs • What fraction is shaded pink?

  17. What fraction is shaded pink? 3 4 48 64 48 = 3 x 16 64 = 4 x 16

  18. Operational Construct • ¼ of 36 • halve and halve again • relationship between times/division and fractional strategies • ¾ of 36 • 0.25 of 36 • 25% of 36

  19. Book 7 • Changing up the way the question is asked.

  20. A Teaching Progression for Percentages • Requires high levels of thinking • Decimals (decimal fractions) • Other handouts

  21. Maths is......explaining... Remember the long term goal – improving their algebraic thinking: One thing you can do to help this every day is to ask questions in class:

  22. What’s the answer?

  23. How did you get the answer?

  24. work does it Why ? always

  25. Fraction Teaching Resources • Numeracy Folder – Number – Frac-Ratio • Key Progressions for Fractions, Decimals, Percentages, Rates and Proportions • A teaching progression for fractions • Intro to Fractions Worksheets • HIBS material • New Numeracy Books • No Nonsense Number Fractions, stages 5-6 • NZMaths (DecimalFractionsOfASet, AddingFractions) • Rime • 10 Ticks (Pack 4 Level 4 and Pack 5 Level 2)

  26. Activity: In groups of 2 or 3 Create a brief outline for a lesson that gets students to learn without being taught an algorithm • How to convert to (and vice versa) • How to find 4 fractions equivalent to • How to simplify (a) (b)

  27. Activity 2 1) Pick one stage of the progression 2) Think of as many relevant fraction based activities as possible for that stage • Consult the Getting Started book • Consult the activity books • Consult Figure It Out • Think of good activities that were used in the past – and still fit • Think them up

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