Numbers 1-20 Intro

Overview

This lesson is designed for Year 7 SEND pupils to introduce, explore and consolidate understanding of numbers 1 to 20. It aligns with the National Curriculum for England's Key Stage 3 Maths guidelines, meeting foundational numeracy skills and focusing on accessibility and engagement for SEND learners. The session will use multi-sensory, practical activities to enhance understanding and retention within 55 minutes.

National Curriculum References

• Number - Number and place value:
  • Recognise, represent and order numbers up to 20 (NC KS3 Number - 1a)
  • Understand place value and the significance of digits in numbers (NC KS3 Number - 1b)
• Use of mathematical language and symbols (NC KS3 1b)
• Develop fluency and confidence with basic number facts (NC KS3 - Fluency in number facts)

Learning Objectives

By the end of the lesson, pupils will be able to:

1. Recognise and say numbers from 1 to 20 confidently.
2. Write numbers 1 to 20 correctly and understand their order.
3. Match numbers to quantities using real objects or pictures.
4. Use correct mathematical vocabulary related to number order (e.g., more than, less than, next to).
5. Engage with numbers 1-20 through multisensory activities supporting SEND needs.

Resources

• Large number flashcards (1-20) with clear, bold digits
• Counting objects (e.g., counters, blocks, beads)
• Number lines (physical and printable)
• Interactive whiteboard/tablet with number games/apps
• Worksheets for tracing and matching numbers (1-20)
• Visual symbols and coloured markers for number sequencing
• Reward stickers or tokens for motivation

Lesson Structure (55 minutes)

1. Starter (5 minutes)

• Activity: Number chant and flashcard reveal
• Teacher shows large number flashcards 1-20 in random order. Pupils chant the number aloud as each card is shown.
• Purpose: Instant recall and sound association of numbers 1-20.
• SEND differentiation: Use a rhythm or clapping to support memory.

2. Introduction (10 minutes)

• Objective: Introduce visual and tangible concepts of number order 1 to 20.
• Teacher places number cards 1 to 20 in order visually on the board with a number line under. Highlight “one more than” and “one less than” concepts using arrows.
• Pupils handle counting objects and physically place the correct amount of objects next to each number card.
• SEND support: Use small groups and individual scaffolding by teaching assistants.

3. Main Activity (20 minutes)

• Interactive Matching and Writing
• Pupils work individually or in pairs to:
  • Match sets of objects (1-20) to the correct numbered card.
  • Complete a worksheet tracing numbers 1-20 and sequencing cut-out number pieces.
  • Engage with an interactive number game on the smartboard/tablet that requires ordering and selection of numbers 1-20.
• SEND differentiation: Provide enlarged worksheets, tactile writing tools, and pre-cut cards for matching.
• Encourage verbalising numbers during activities to reinforce spoken language.

4. Reinforcement & Reasoning (10 minutes)

• Group discussion and reasoning game: ‘Number Detective’
• Teacher asks questions like:
  • “Which number comes after 7?”
  • “Which number is 2 less than 14?”
  • “Can you find a number bigger than 16 but smaller than 20?”
• Pupils use number cards or number lines to find answers.
• This promotes mathematical vocabulary use and reasoning skills.

5. Plenary (5 minutes)

• Pupils take turns to say a number aloud and share one fact about the number (e.g. “10 is even” or “15 comes after 14”).
• Teacher reviews key vocabulary (more than, less than, next to).
• Reward positive participation with stickers or tokens.
• Quick recap chant or song to consolidate memory.

Assessment and Feedback

• Ongoing, formative assessment through observation during activities. Note who can:
  • Identify numbers 1-20 correctly.
  • Order numbers physically and verbally.
  • Match quantities to correct numerals.
• Use thumbs-up/thumbs-down or traffic light system for self-assessment at lesson end.
• Provide verbal praise and specific feedback to motivate pupils and guide next steps.

SEND Considerations

• Multi-sensory learning for engagement: visual, auditory, kinaesthetic methods.
• Small class size (10 pupils) allows personalised support.
• Clear instructions broken into steps with visual cues.
• Frequent checks for understanding and adult support where needed.
• Calm, structured environment with minimal distractions.

This lesson plan ensures SEND pupils have meaningful, supported access to foundational numeracy skills crucial for further maths learning. The use of movement, speech, and varied teaching tools follows best practice from the National Curriculum and SEND guidelines for inclusivity.