Math lesson plan · 1st grade (Year 2 in England) · 45 minutes
Doubles facts to 10 + 10
Addition and subtraction
CCSS 1.OA.C.6England: Y1 Addition and subtractionEngland: Y2 Addition and subtraction
Objective and success criteria
Students will: Doubles facts to 10 + 10.
- 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: Add within 10
Leads to: Use a double to add near doubles
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 (Add within 10). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- Diego has 6 marbles. A friend gives Diego 4 more. How many marbles does Diego have now? → 10Prompt: Are we putting groups together or taking away?
- There are 2 apples in a box and 1 on the table. How many apples are there in all? → 3Prompt: Are we putting groups together or taking away?
- Ava has 7 marbles. A friend gives Ava 2 more. How many marbles does Ava have now? → 9Prompt: Are we putting groups together or taking away?
Hook · 5 min
- Give a real shopping total or a score difference and ask for a quick estimate first.
- Share the objective: Doubles facts to 10 + 10. 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: Grace builds two towers with 10 blocks each. How many blocks altogether?
- Step 1: 10 + 10 = 20
- Step 2: 20
- Answer: 20
- 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.
- A domino has 3 dots on each side. How many dots altogether? → 6Prompt: Two equal parts: that is a double.
- __ + __ = 8 (both numbers the same) → 4Prompt: Which double makes 8?
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.
- A ladybird has 7 spots on each wing. How many spots altogether? → 14Prompt: Two equal parts: that is a double.
- __ + __ = 6 (both numbers the same) → 3Prompt: Which double makes 6?
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: Add within 10.
- 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
- Move on to: Use a double to add near doubles.
- 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