Grade 1: Step Up to Grade 2

Numbers to 100 on the
Number Line
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Intervention Lesson A32
Math Diagnosis and
Intervention System
Intervention Lesson A32
Numbers to 100 on the Number Line
1.
2.
3.
4.
Sample answers are shown.
1. Say: Every number has its own place on the number line. The numbers go in order from least to
greatest. What number comes after 20? Have children write 21 in the box.
2. What number comes between 23 and 25? Have children write 24 in the second box.
3. Have children complete the number lines for Problems 1 and 2. Ask questions like those above for
children who have difficulty.
4. For Problem 3, have children find 64 on the number line and circle it and its point. Ask: What number
is before 64? After? Have children circle 67 and its point. Ask: Is 67 greater than or less than 64?
5. Have children circle a number that is greater than 53 on the last number line. Then have them circle one
that is less than 46.
Numbers to 100 on the Number Line (continued)
Write the missing numbers.
5.
6.
7.
Intervention Lesson A32 157
Circle the numbers on the number line.
8. 28, 33
9. 91, 97
158 Intervention Lesson A32
Math Diagnosis and
Intervention System
Intervention Lesson A32
© Pearson Education, Inc.
Teacher Notes
Math Diagnosis and
Intervention System
Intervention Lesson A32
Ongoing Assessment
Ask: Which number is greater, a number left of
50 or a number right of 50, on the number line?
The number right of 50 is greater. Numbers increase
from left to right on the number line.
Error Intervention
If children have trouble associating numbers with
points on a number line,
then use A13: Ordering Numbers to 12 with a
Number Line.
If You Have More Time
Have 11 children each write a different number
from 70 to 80 on a sheet of paper and line up in
any order, facing the class. Have other children
take turns telling one child where to move to show
where that child’s number would go on the number
line. Continue until the numbers are in order.
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