Math lesson plan · Kindergarten (Reception and Year 1 in England) · 45 minutes
Add within 10
Addition and subtraction
CCSS K.OA.A.1CCSS K.OA.A.2England: Reception NumberEngland: Y1 Addition and subtraction
Objective and success criteria
Students will: Add within 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 and subtract within 5; Compare numbers to 10
Leads to: Make 10 (number bonds); Add within 20; Add by counting on from the bigger number
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 and subtract within 5; Compare numbers to 10). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
Hook · 5 min
- Give a real shopping total or a score difference and ask for a quick estimate first.
- Share the objective: Add within 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: Ines has 1 apples. A friend gives Ines 1 more. How many apples does Ines have now?
- Step 1: 1 + 1 = 2
- Answer: 2
- 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.
- Liam has 2 balls. A friend gives Liam 6 more. How many balls does Liam have now? → 8Prompt: Are we putting groups together or taking away?
- Fatima has 5 cards. A friend gives Fatima 4 more. How many cards does Fatima have now? → 9Prompt: Are we putting groups together or taking away?
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.
- Omar collected 3 balls in the morning and 2 in the afternoon. How many is that altogether? → 5Prompt: Are we putting groups together or taking away?
- Mateo collected 7 beads in the morning and 2 in the afternoon. How many is that altogether? → 9Prompt: Are we putting groups together or taking away?
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 and subtract within 5.
- 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: Make 10 (number bonds); Add within 20; Add by counting on from the bigger number.
- 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/kindergarten.
Free lesson plan from eurekami.com/lesson-plan-builder