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The Number Line to 100

Second graders use a number line to add and subtract by “jumping” forward and back — a powerful picture that shows how numbers grow and how counting on works.

Grade 2Number Line50 minutes1 class periodGradual ReleaseExplicit teaching4 StandardsCommon Core
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Lesson at a Glance

Everything you need before the bell rings

Learning Objectives

Students will be able to…

  • ✓Find numbers on a number line.
  • ✓Add by jumping forward.
  • ✓Count on from a number.
  • ✓Show a sum on a number line.
Essential Question

If you start at 20 and jump forward 15, where do you land? A number line lets you SEE addition as a jump along the numbers!

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Lesson Phases
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Vocabulary Terms
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Standards Aligned
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Interactive Task
Model · Interactive Tool

Jump on the Number Line

Project this and set a starting number and a jump. Watch the arc leap forward to the answer — addition you can see!

📍 Jump forward — add on the number line!Try it
Start at: 20
Jump: 15

The Lesson · Gradual Release (I Do · We Do · You Do)

50 minutes, five moves

Tap any phase to open the teacher moves and student actions.

1

Launch — Jump Forward

5 min

Start at 20, jump forward 15 — where do you land?

👩‍🏫 Teacher Moves

  • Show a number line.
  • Ask about a forward jump.
  • Set the goal: the number line.

🎒 Student Actions

  • See the line.
  • Picture the jump.
  • Predict the landing.
2

I Do — Adding by Jumping

10 min

Teacher models.

👩‍🏫 Teacher Moves

  • Find the start number.
  • Jump forward to add.
  • Land on the sum.

🎒 Student Actions

  • Find the start.
  • Jump forward.
  • Read the sum.
3

We Do — Jump Together

13 min

Class uses Jump on the Number Line.

👩‍🏫 Teacher Moves

  • Set start and jump.
  • Read where it lands.
  • Say the addition.

🎒 Student Actions

  • Set the jump.
  • Read the landing.
  • Say it.
4

You Do — On Your Own

12 min

Students use the number line.

👩‍🏫 Teacher Moves

  • Add using jumps.
  • Find numbers on the line.
  • Draw a jump for a sum.

🎒 Student Actions

  • Add by jumping.
  • Find numbers.
  • Draw a jump.
5

Close — Close

5 min

One jump.

👩‍🏫 Teacher Moves

  • Give a start and a jump.
  • Find where it lands.
  • Hand out the exit ticket.

🎒 Student Actions

  • Find the sum.
  • Show the jump.
  • Complete the exit ticket.
Standards Alignment

Built to the standards you report on

Aligned to the Common Core State Standards for Mathematics.

CCSS
2.MD.6

Represent whole numbers on a number line and use it to add and subtract.

CCSS
2.NBT.5

Fluently add and subtract within 100.

CCSS
2.MD.5

Use addition and subtraction within 100 to solve length problems.

SMP
MP.5

Use a number line as a tool to add and subtract.

Differentiation

One lesson, every learner

Multilingual Learners

ELL / EMERGING READERS
  • Point to each number.
  • Sentence frame: “I start at ___ and jump ___.”
  • Use a floor number line.

Support & Access

IEP / 504
  • Use jumps of 5 or 10.
  • Count each jump aloud.
  • Start at friendly numbers.

Stretch & Extend

GIFTED / EARLY FINISHERS
  • Subtract by jumping back.
  • Use jumps of tens and ones.
  • Find a missing addend.
Materials

What to gather

  • 📽️Projector / board
  • 📐Number lines
  • 💻Jump on the Number Line
  • ✏️Pencils
  • 👟A floor number line
  • 🎫Exit-ticket slips
Vocabulary

Key terms — hover for a quick definition

number linea line showing numbers in orderjumpa move forward or backaddto join amountscount onkeep counting forwardstartthe first numbersumthe answer to additionforwardahead (to add)backwardback (to subtract)
Evaluate

Exit Ticket

Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.

QUESTION 1
You start at 30 and jump forward 20 on the number line. Where do you land?
50.
QUESTION 2
On a number line, which way do you jump to ADD?
Forward (to the right).
QUESTION 3
What does a number line help you see?
How numbers are ordered, and how adding and subtracting are jumps forward and back.

Going deeper? Jump back to subtract.

Have students subtract on the number line by jumping backward — like starting at 50 and jumping back 20 to land on 30. A printable number-line sheet is in the Math library.

Study · Flashcards

Study the key terms

Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.

🃏 Number Line to 100Flip
Card 1
Term
Tap to flip →
Meaning
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Nice work!

Practice · Quiz

Check your understanding

A quick self-check with instant feedback, drawn from this lesson’s key terms.

📝 Number Line to 100Quiz
Score: 0
1 / 6
Question 1
0%

Nice work!

Practice · Worksheet

Printable worksheet

A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.

🖨️ Number Line to 100Print
Name: ________________________
Date: ____________

Part A · Write the word that matches each meaning

Word bank: add, backward, count on, forward, jump, number line, start, sum
  1. a line showing numbers in order
  2. ahead (to add)
  3. to join amounts
  4. the first number
  5. a move forward or back
  6. back (to subtract)
  7. the answer to addition
  8. keep counting forward

Part B · Show what you learned

  1. You start at 30 and jump forward 20 on the number line. Where do you land?
  2. On a number line, which way do you jump to ADD?
  3. What does a number line help you see?
Answer key — Part A: 1) number line · 2) forward · 3) add · 4) start · 5) jump · 6) backward · 7) sum · 8) count on
Part B: 1) 50. 2) Forward (to the right). 3) How numbers are ordered, and how adding and subtracting are jumps forward and back.