About this example
We checked every number in the pack. The math was right; we sharpened the making-ten example so it shows 8 + 2 = 10 and then 10 + 5, and replaced one worksheet question that asked six-year-olds to 'evaluate'.
It is a good example of how LessonHQ handles early math: short steps, strategies children can say out loud, and a worksheet with a full answer key.
Curriculum alignment: Common Core 1.OA.C.6 (add and subtract within 20 using strategies such as making ten and the relationship between addition and subtraction) and 1.OA.B.4 (subtraction as an unknown-addend problem).
What's in the pack
- 10 editable slidesTitle, vocabulary, teaching slides, a true or false check and a closing slide, in one theme.
- Lesson planA 60-minute plan with timed phases, differentiation and assessment for learning.
- Worksheet with answer key3 questions worth 10 marks, with full answers.
- Warm-up5 questions with answers to open the lesson.
- Reading passageA short text with 4 questions and answers.
- Exit ticket3 questions with model answers.
- Study guideKey vocabulary, facts and concepts on one page.
- Teacher notesMisconceptions, IEP/504 and ELL supports, and homework.
The slide deck (10 slides)
Every slide below is rendered live from the generated pack, in the Sunset theme the generator picked. In your account each one is editable, and the deck exports to PowerPoint or Google Slides as real text boxes, not flat pictures. The faint LessonHQ watermark only appears on public previews.
The printable documents
The lesson plan, worksheet and its mark scheme, starter, exit ticket and teacher notes come with the slides. Pick a tab to read each one in full. They print on US Letter and download as Word, PDF or Google Docs.
Timed phases with teacher and student activity, assessment for learning, differentiation and resources.
Why this pack works in the classroom
Strategies with names
The lesson teaches making ten (8 + 5 becomes 8 + 2 + 3) and doubles plus one (6 + 7 = 6 + 6 + 1) by name, which gives students a way to explain their thinking and not just give an answer.
Addition and subtraction together
It shows that if you know 9 + 6 = 15, you can work out 15 take away 6. Seeing the two operations as a family is the heart of 1.OA.B.4.
A misconception with a hands-on fix
The notes address students who add when they should subtract (5 - 2 = 7) and suggest modeling the take-away action with counters, a fix any teacher or aide can use on the spot.
How the lesson runs
The 60-minute lesson plan splits the lesson into 5 timed phases. This is the plan exactly as it was generated.
- 1. Starter8 minTeacher: Display retrieval quiz on the board, walk around prompting students to think aloud.Students: Complete retrieval questions independently, then self‑mark.
- 2. Main Teaching13 minTeacher: Explain addition using number bonds, model subtraction with concrete counters, ask guiding questions.Students: Listen, answer oral questions, copy short equations on mini whiteboard.
- 3. Active Learning11 minTeacher: Facilitate paired card‑sorting game, circulate to support reasoning.Students: Work in pairs to match addition and subtraction cards that give the same total.
- 4. Independent Task8 minTeacher: Hand out worksheet, offer brief reminders, walk the room.Students: Complete three mixed problems individually, showing work on a number line.
- 5. Plenary10 minTeacher: Collect exit tickets, read a few responses aloud, clarify any remaining doubts.Students: Complete 3‑question exit ticket independently.
Straight from the pack
A few pieces copied word for word from the generated documents, so you can see the level of detail.
Learning objective
I can add and subtract numbers within 20 using mental strategies and explain my thinking.
Learning targets
- I can count forward and backward confidently to 20
- I can add two numbers within 20 using number bonds
- I can subtract a smaller number from a larger number within 20
- I can choose a mental‑math strategy to solve mixed problems quickly
Differentiation
- Support: Provide number lines and visual counters; pair lower‑ability students with a buddy for modeling.
- Core: Students use mental number‑bond strategies and write simple equations.
- Extension: Challenge students to solve three‑step problems and explain their chosen strategy.
Warm-up questions
- What number comes after 13?
- Count forward from 7 to 12.
- What is 5 + 3?
- If you have 14 and take away 6, what do you have?
- Show two different ways to make 15 using numbers under 20.
Worksheet questions
- What is the sum of 9 and 7?
- Explain how you can check 14 - 5 using a number bond.
- Solve 12 + 6 - 4. Show your jumps on a number line.
Misconceptions it tackles
- Students think 5 - 2 = 7 because they add instead of subtract.: Model the ‘take away’ action with counters and show the result is fewer, not more.
- Students think they must always count on from the first number, even when it is the smaller one (e.g., counting on 9 from 3 for 3 + 9).: Show that 3 + 9 = 9 + 3, so start at the larger number, 9, and count on 3 to reach 12.
Making it fit your class
Use ten frames and two-color counters with the making-ten slides. For students ready for more, use the worksheet's last question as a model and ask them to write their own number story.
This pack took about a minute to generate. Yours will not be a copy of it: type the same topic and grade and you get a fresh pack, then you can change the length, the ability level and the theme before you press Generate.
Make your own on this topic
The form opens with “Adding and subtracting within 20” and Grade 1 filled in. The free plan includes 2 full lesson packs with no card needed.
Make your own on this topic →Get the editable files
This pack is in the LessonHQ marketplace, where you can download the editable slides and documents.
View it in the marketplace →Frequently asked questions
Is this a real LessonHQ lesson pack?
Yes. It was generated by LessonHQ from the topic "Adding and subtracting within 20" and grade Grade 1, in about a minute, and saved to our library. We read it and checked the facts and answers before showing it here; any small corrections are noted on this page.
Is it aligned to Common Core?
Yes, it maps to 1.OA.C.6 and 1.OA.B.4. When you generate your own lesson, LessonHQ uses your state's standards where they differ from Common Core.
Will I get exactly this pack if I make my own?
No, you get a fresh pack written for your request. Type the same topic and LessonHQ writes a new set of slides and documents, so you can make several versions and keep the best. You can also change the length, ability level and theme first.
Can I edit the slides and documents?
Yes. Every slide is editable in LessonHQ and exports to PowerPoint or Google Slides as real text boxes and shapes. The documents download as Word, PDF or Google Docs on US Letter paper.
How much does it cost?
The free plan includes 2 full lesson packs with no card needed, and the slide generator lets you make 3 decks without signing up. Paid plans add more packs each month.