Counting by hundreds

About the Lesson
Counting by hundreds helps students understand how numbers grow in larger groups. Instead of adding one or ten at a time, they learn that ten tens make one hundred. Students will practice skip-counting by hundreds using number charts, number lines, and objects like base-ten blocks or play money.
This skill strengthens place value knowledge, prepares students for adding and subtracting larger numbers, and makes counting beyond 100 easier.

Examples
📌 Counting with Objects
“My Blocks”
→ Beginning: “I built one tower of 100 blocks.”
→ Middle: “Then I built another tower—now I have 200 blocks.”
→ End: “Finally, with 3 towers, I counted 300 blocks.”

📌 Number Line Order
“The Airplane Jumps”
→ First: “It lands on 100.”
→ Next: “It flies to 200.”
→ Last: “It zooms to 300.”

📌 Real-Life Pattern
“Counting Dollars”
→ First: “One $100 bill is one hundred.”
→ Next: “Two $100 bills is 200.”
→ Last: “Three $100 bills is 300.”

Learning Objectives
✅ Count forward by hundreds up to 1,000 (OAS 1.N.1.4, CCSS 1.NBT.A.1 extension).
✅ Understand that ten tens = one hundred.
✅ Recognize and extend skip-counting patterns on a hundreds chart and number line.
✅ Connect counting by hundreds to real-life objects (base-ten blocks, coins, money).
✅ Compare numbers by hundreds (more than/less than).

Fun Practice Activities
1. Counting by Hundreds Worksheet ✏️
Part 1: Fill in missing numbers: 100, __, 300, __, 500, …
Part 2: Match base-ten blocks (100 flats) to the correct number (e.g., 4 flats = 400).

🔍 Worksheet Answer Key: Count flats aloud as a class: “100, 200, 300, 400!”

2. Interactive Skip-Counting Quiz 🏗️
Materials: Number cards (100–1,000), base-ten blocks, play money
Number Order Challenge:
“What comes AFTER 400?”
a) 500
b) 450
c) 600
→ Action: Students hold up card “500” and say: “One hundred more than 400 is 500.”

Missing Number Slam:
“Complete: 100, 200, __, 400”
a) 300
b) 250
c) 500
→ Action: Students write correct answer on whiteboards (300).

Real-Life Connection:
Show 5 one-hundred-dollar bills → Ask: “How much money?” → Answer: 500 dollars.

Number Fixer:
“Fix this sequence: 100, 400, 200, 300”
→ Action: Students reorder themselves while chanting:
“100, 200, 300, 400.”

Offline Homework: Hundreds Counting Flip Book 📖
📝 Instructions:
Choose a theme (e.g., towers of blocks, $100 bills, hundreds chart).
Create Flip Book:
Page 1: Draw/Write 100 (“1 hundred”)
Page 2: Draw/Write 200 (“2 hundreds”)
Page 3: Draw/Write 300 (“3 hundreds”)
Add Number Tabs: Green=100, Yellow=200, Red=300.
Share: Present to family by counting aloud: “100, 200, 300 …” and showing drawings.

This lesson helps students practice counting by hundreds to build place value skills, recognize patterns, and connect large numbers to real-world examples.