During Unit 3, your children will develop an understanding of fractions, beginning with unit fractions. They will view fractions as being built out of unit fractions, and use fractions along with visual fraction models to represent parts of a whole.  Your children will understand a fraction as a number on a number line and represent fractions on a number line.

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Key Vocabulary

Students need to:

  • 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.
  • Partition shapes into parts with equal area.  Express the area of each part as a unit fraction of the whole.  For example, partition a shape into 4 parts with equal area, and describe the area of each part as ¼ of the area of the shape.
  • 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.