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Topic E
Equivalent Fractions
Module 5: Lesson 21
Objective: Recognize and show that equivalent
fractions refer to the same point on the number
line.
Whole Number Division (8 minutes)
1 Whole Expressed as Unit Fractions
(4 minutes)
Show me a number bond which partitions a whole
into 3 equal parts.
What is the unit fraction?
Application Problem (8 minutes)
Dorothea is training to run a 2 mile race. She marks off her
starting point and the finish line. So that she can track her
progress, she places a mark at 1 mile. She then places a mark
halfway between her starting position and 1 mile, and another
halfway between 1 mile and the finish line.
Draw a number line to show what unit fraction she makes
as she marks the points on her run.
How far has she run when she gets to the third marker?
Application Problem (8 minutes)
Concept Development (30 minutes)
Materials: (S) Fraction strips (4 ¼ inches by 1 inch), math journals, crayons,
glue, tape, meter stick, number line on the floor
We’re going to make copies of unit fractions with our fraction strips. Fold
your first strip into halves.
Label each part with a unit fraction. Then use a crayon to shade in 1 half.
Glue your fraction strip at the top of a new page in your math journal.
Fold another fraction strip to make copies of fourths. Label each part with a
unit fraction. Then glue your fraction strip directly below the first one in your
math journal. Make sure that the ends are lined up.
Now shade the number of fourths that are equivalent to the shaded half.
Whisper to your partner how many units you shaded.
Concept Development (30 minutes)
Guide students through the same sequence for a fraction strip
folded into eighths.
Write the shaded fraction to the right of each fraction strip in your
journal.
The unit fractions are different. Discuss with a partner whether or
not the fractions are equal, or equivalent.
I hear some uncertainty. Beside our fraction strips, what’s another
tool we can use to test their equivalence?
Concept Development (30 minutes)
Concept Development (30 minutes)
Concept Development (30 minutes)
Fold your last 2 fraction strips. One should be copies of thirds and the
other should be copies of sixths. Label the parts with unit fractions and
glue these strips below the others in your math journal in order from
greatest to least. Shade 1 third. Then shade the number of sixths equal
to 1 third.
Now work with your partner to measure and draw a new number line
using your thirds and sixths. Then using your other strips, find and label
all the fractions that are equivalent to thirds and sixths.
Problem Set (10 minutes)
Student Debrief (10 minutes)
Exit Ticket (3 minutes)
Homework
3-5 Lesson 21
Homework
Is Due Tomorrow!

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Module 5 lesson 21

  • 1. Topic E Equivalent Fractions Module 5: Lesson 21 Objective: Recognize and show that equivalent fractions refer to the same point on the number line.
  • 2. Whole Number Division (8 minutes)
  • 3. 1 Whole Expressed as Unit Fractions (4 minutes) Show me a number bond which partitions a whole into 3 equal parts. What is the unit fraction?
  • 4. Application Problem (8 minutes) Dorothea is training to run a 2 mile race. She marks off her starting point and the finish line. So that she can track her progress, she places a mark at 1 mile. She then places a mark halfway between her starting position and 1 mile, and another halfway between 1 mile and the finish line. Draw a number line to show what unit fraction she makes as she marks the points on her run. How far has she run when she gets to the third marker?
  • 6. Concept Development (30 minutes) Materials: (S) Fraction strips (4 ¼ inches by 1 inch), math journals, crayons, glue, tape, meter stick, number line on the floor We’re going to make copies of unit fractions with our fraction strips. Fold your first strip into halves. Label each part with a unit fraction. Then use a crayon to shade in 1 half. Glue your fraction strip at the top of a new page in your math journal. Fold another fraction strip to make copies of fourths. Label each part with a unit fraction. Then glue your fraction strip directly below the first one in your math journal. Make sure that the ends are lined up. Now shade the number of fourths that are equivalent to the shaded half. Whisper to your partner how many units you shaded.
  • 7. Concept Development (30 minutes) Guide students through the same sequence for a fraction strip folded into eighths. Write the shaded fraction to the right of each fraction strip in your journal. The unit fractions are different. Discuss with a partner whether or not the fractions are equal, or equivalent. I hear some uncertainty. Beside our fraction strips, what’s another tool we can use to test their equivalence?
  • 10. Concept Development (30 minutes) Fold your last 2 fraction strips. One should be copies of thirds and the other should be copies of sixths. Label the parts with unit fractions and glue these strips below the others in your math journal in order from greatest to least. Shade 1 third. Then shade the number of sixths equal to 1 third. Now work with your partner to measure and draw a new number line using your thirds and sixths. Then using your other strips, find and label all the fractions that are equivalent to thirds and sixths.
  • 11. Problem Set (10 minutes) Student Debrief (10 minutes) Exit Ticket (3 minutes)