CCSS Math/Number and Operations-Fractions: 4.NF.2
- Extend understanding of fraction equivalence and
2. Compare two fractions with different numerators
and different denominators (e.g., by creating common
denominators or numerators, or by comparing to
a benchmark fraction such as 1/2). Recognize that
comparisons are valid only when the two fractions refer
to the same whole. Record the results of comparisons
with symbols >, = or <, and justify the conclusions (e.g.,
by using a visual fraction model).
Before teaching this lesson, you may want to introduce students to the concept of equivalent fractions. (Please visit Equivalent Fraction Activitites.)
Read aloud Pizza Fractions by Jerry Pallotta to give students a visual representation of fractions.
- Explain to students that they are going to compare and order fractions.
- Print out and display the first two Fraction Pizza templates on the chalkboard, whiteboard or document
- Point out that the two pizzas are the same size, but the first pizza is cut into four slices and the second pizza
is cut into eight slices. Ask students to identify which pizza has larger slices.
- Say, “Imagine you are very hungry and someone offers you one slice of pizza. Would you rather have one slice of this pizza that is cut into fourths?” (Circle one of the slices on the first pizza and write “1/4” beneath the
pizza.) Then ask, “Or would you rather have one slice of this pizza that is cut into eighths?” (Circle one of the
slices on the second pizza and write “1/8” beneath the pizza.)
- Invite students to respond. Then reinforce the correct answer by saying, “Yes, 1/4 is larger than 1/8!” (Write
“1/4 > 1/8” on the board or camera.)
- Reinforce the concept by explaining that, when comparing fractions with the same numerator (top number),
the fraction with the smaller denominator (bottom number) is greater. To further illustrate that this is true
even when the numerator is smaller than the denominators, write “4/10” and “4/6” and explain how 4/6 is
greater than 4/10.
- Write the fractions 5/12 and 7/12 on the board or document camera. Ask, “What about these two fractions?
Their denominators are the same. How do we know which is greater?”
- Display the pictures of the two pizzas that are cut into twelfths. Then say, “Think of pizzas again. These
pizzas are cut into 12 slices. If you are really hungry, would you want five of the 12 slices (shade in 5/12) or
seven of the 12 slices (shade in 7/12)?”
- Reinforce correct answers and point out that when the denominator is the same, the fraction with the larger
numerator is greater. (Write “7/12 > 5/12.”)
- Refer to the examples in Pizza Fractions to further reinforce learning. (See pages 6–11 in the book.)
- Give each student a copy of the Comparing Fractions practice page and a pencil.
- Invite students to shade in the parts of the pizzas that correspond to the fractions beneath them.
- Then have students compare the pizzas to determine which fractions are greater than, less than or equal to
the others. (Students can use the answer sheet to check their answers.)
- Pair students with a partner and give each student a copy of the Comparing Fractions activity card/recording sheet and spinners. (Each pair of students should have a set of two spinners.)
- Have students insert a pencil through a paper clip and hold the pencil upright as an arrow for the spinners.
- Instruct students to use the pennies or other small objects as game markers and follow the recording sheet
directions to play the Comparing Fractions game! (An answer key is provided.)
the 3rd–5th grade lesson plan. (Includes all printable materials.)