Math lesson plan · 1st grade (Year 2 in England) · 45 minutes
Is the number sentence true or false?
Addition and subtraction
CCSS 1.OA.D.7England: Y1 Addition and subtractionEngland: Y2 Addition and subtraction
Objective and success criteria
Students will: Is the number sentence true or false?.
- 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: Missing numbers and the equal sign
Leads to: the next skill in this area.
Materials: Base-ten blocks, Number lines, Hundred square, Mini whiteboards and pens, Printed student sheet (below).
Warm-up · 5 min
- Quick retrieval from earlier learning (Missing numbers and the equal sign). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- 5 + 3 = 2 + __ → 6Prompt: The equal sign means both sides have the same value.
- True or false? 5 + 3 = 3 + 5 (True / False) → TruePrompt: Work out the value of each side.
- __ + 8 = 11 → 3Prompt: What do you add to 8 to make 11?
Hook · 5 min
- Give a real shopping total or a score difference and ask for a quick estimate first.
- Share the objective: Is the number sentence true or false?. 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: True or false? 3 + 3 = 6
- Step 1: 3 + 3 = 6
- Step 2: True.
- Answer: True
- 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.
- True or false? 8 + 9 = 18 (True / False) → FalsePrompt: Work out the left side.
- True or false? 6 + 6 = 3 + 10 (True / False) → FalsePrompt: Work out each side.
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.
- True or false? 2 + 5 = 1 + 7 (True / False) → FalsePrompt: Work out each side.
- Mei says "7 = 7 + 1" is true. Is Mei right? (Yes / No) → NoPrompt: Work out the value of each side.
Watch out for
- Subtracting the smaller digit from the bigger one in every column (52 − 17 = 45).
- Forgetting to add the regrouped (carried) ten.
Support and stretch
Support
- Review first: Missing numbers and the equal sign.
- Use concrete materials: base-ten blocks.
- 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