Math lesson plan · 1st grade (Year 2 in England) · 45 minutes
Move around a number grid to 120
Number sense
CCSS 1.NBT.A.1CCSS 1.NBT.C.5England: Y1 Number and place valueEngland: Y2 Number and place value
Objective and success criteria
Students will: Move around a number grid to 120.
- I can answer questions on today's skill on my own, without help.
- I can explain each step and say why it works.
- I can check my answer and spot a mistake.
Before and after
Needs first: Count to 120; Missing numbers on a hundred square
Leads to: the next skill in this area.
Materials: Place value chart, Base-ten blocks or a number line, Mini whiteboards and pens, Printed student sheet (below).
Warm-up · 5 min
- Quick retrieval from earlier learning (Count to 120; Missing numbers on a hundred square). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- This is a row of the hundred square. Which number is missing? 21, 22, 23, __, 25, 26, 27, 28, 29, 30 → 24Prompt: Along a row, the numbers go up by one.
- Count on in tens: 36, 46, 56, __ → 66Prompt: Adding 10 changes the tens digit. Does the ones digit change?
- This is a row of the hundred square. Which number is missing? 21, 22, 23, 24, 25, 26, __, 28, 29, 30 → 27Prompt: Along a row, the numbers go up by one.
Hook · 5 min
- Show a number in the news or a price tag and ask what each digit is worth.
- Share the objective: Move around a number grid to 120. Read the success criteria together.
I do: model it · 10 min
- Work through the example out loud, saying why you do each step, not just what you do.
- Example: On a number grid with rows of ten, which number is just above 107?
- Step 1: 107 − 10 = 97
- Step 2: 97
- Answer: 97
- Pause after each step and ask a student to say what comes next.
We do: guided practice · 10 min
- Do these together. Students try each step on whiteboards before you reveal it.
- Use the hints as prompts rather than giving the answer.
- On a number grid with rows of ten, which number is just below 26? → 36Prompt: Each row has ten numbers.
- These numbers are in one column of a number grid. Which is missing? 77, 87, 97, __ → 107Prompt: What changes as you go down a column?
You do: independent practice · 10 min
- Students work on the student sheet. Circulate and check the first two answers of every student early.
- Students who finish: write a question of their own for a partner, with the answer.
The 8 questions are on the student sheet below, with answers in the key.
Exit ticket · 5 min
- Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
- Keep counting past 100: 101, 102, 103, __ → 104Prompt: After 100, count on just like after 0: 101, 102, 103…
- On a number grid with rows of ten, which number is just above 55? → 45Prompt: Each row has ten numbers.
Watch out for
- Reading 1,045 as one thousand four hundred five: point to each place and say its value.
- Thinking a longer number is always bigger, even with decimals (0.45 vs 0.5).
Support and stretch
Support
- Review first: Count to 120.
- Use concrete materials: place value chart.
- Give the first step of each question, or a partly worked example to finish.
- Pair with a confident partner for the guided practice.
Stretch
- Explain a common mistake in writing and how to fix it.
- Write a word problem that uses today's skill, then solve a partner's.
Homework and more practice
Free online practice with hints and printable worksheets for this skill: eurekami.com/math/grade-1.
Free lesson plan from eurekami.com/lesson-plan-builder