Parent guide · Grade 1 Math · Unit 5

Lesson 5.3 Counting to 120

Written for the parent. Read the Say this lines aloud as they are, or in your own words. Answers for you are marked Listen for.

At a glance

Time: 5 sessions of 20–25 minutes
Goal: Count, read and write numbers to 120.
You need: Craft sticks and rubber bands
Dice
Pencil and crayons
Print: Worksheet A · Worksheet B · the lesson page (it also has a short video (5:00))

Steps

Warm-up
Do this: Ask these out loud. Your child answers out loud; no paper needed.
- Ask: “What number is ten more than 27?” Listen for: 37
- Ask: “What number is ten less than 31?” Listen for: 21
- Ask: “What number is ten less than 62?” Listen for: 52
- Ask: “What number is ten more than 38?” Listen for: 48
- Ask: “What number is ten more than 49?” Listen for: 59
Teach the new idea
Say this: “After 100 we start over: 101, 102 … 110, 111 … 120.”
Say this: “Writing 105 needs a 0 in the tens place.”
Say this: “One hundred one: the number after 100, written 101.”
Show how
Show: What number comes just before 100?
Say this: “100 − 1 = 99”
Answer: 99
Show: Write the number in digits: one hundred sixteen
Say this: “Read it in groups: one hundred sixteen → 116”
Answer: 116
Practice together
Do this: Your child does these with you. Let them try first; help only after a real try.
Ask: Fill in the missing number: 103, 104, 105, ___, 107
Listen for: 106
If stuck: The numbers go up by 1 each time.
Ask: Fill in the missing number: 106, 107, 108, ___, 110
Listen for: 109
If stuck: The numbers go up by 1 each time.
Ask: Fill in the missing number: 111, 112, 113, ___, 115
Listen for: 114
If stuck: The numbers go up by 1 each time.
7 more practice items on the lesson page, and on Worksheet A and Worksheet B.
Watch for
- Writing 1005 for one hundred five.
Game: Bundle Race
Roll two dice and take that many sticks. Each time you have ten, bundle them with a rubber band. First to 100 (ten bundles) wins.
Narration
Say this: “Tell me what you learned today. Show me with your hands or the counters if you like.”
Listen for: Count, read and write numbers to 120.
Daily habit
Count to 120 by tens and by ones. Count by tens starting from any number: 7, 17, 27 …

Spread over the week

5 sessions of 20–25 minutes. Stop while it is still going well.

Session 1. Warm-up, then teach the new idea (steps 1 and 2).
Session 2. Warm-up again, then show how with the examples.
Session 3. Practice together, then play the game.
Session 4. More practice on the worksheet, and the daily habit.
Session 5. Quick check: narration and a few practice items. Move on when it is mostly right.