Counting and Comparing

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Lesson Overview

Curriculum Area: Mathematics
Year Group: Year 1
National Curriculum Reference: Year 1 pupils should, according to the UK Mathematics Curriculum, be able to count to and across 100, beginning with any number, count in steps of one, and identify and represent numbers using objects and pictorial representations. This lesson specifically focuses on numbers 11-20 and the concepts of ordering and comparing numbers within this range.

Lesson Duration: 60 minutes
Unit: Counting 11 to 20 (Lesson 3 of 4)
Lesson Objectives:

• Securely count forward from any number between 11 to 20.
• Compare numbers between 11 and 20, identifying which is larger or smaller.
• Arrange numbers from 11 to 20 in sequential order.
• Collaborate in groups to reinforce understanding of numerical order and relationships.

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Learning Outcomes

By the end of this lesson, students will:

1. Count aloud from 11 to 20 confidently.
2. Identify the order of numbers within this range.
3. Use mathematical language such as "greater than," "less than," and "equal to."
4. Work collaboratively to develop practical number sense.

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Resources Needed

• Number cards (sets containing numbers 11 to 20, one set per pair of students).
• Small counting cubes or counters (at least 50 per group).
• A large visual number line displayed in the room (11 to 20).
• Mini whiteboards and pens (one per student).
• Laminated comparison symbols: >, <, = (enough for group activities).
• A “number treasure chest” (decorated box with number cards for the group task).

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Lesson Structure

1. Introduction (10 minutes)

1. Quick Warm-Up Activity (5 minutes):
   Begin by asking students to count aloud from 1 to 20 as a class. When they reach 10, guide their focus by saying, “Let’s count slowly from 11 to 20,” modelling clarity and precision.
   Then, count backwards from 20 to 11 as a class. Give extra emphasis to the ‘teen’ numbers (e.g., thirteen, fourteen), ensuring students pronounce them correctly and note the difference between similar-sounding numbers (e.g., fourteen and forty).

2. Learning Intentions (2 minutes):
   Share the lesson objectives in simple terms:

   • “Today, we will practise counting forwards and backwards between 11 and 20.”
   • “We’ll also compare numbers to see which is bigger or smaller.”
   • “Finally, we’ll work in groups to put our numbers in the right order!”

3. Engage and Motivate (3 minutes):
   Show the students the “number treasure chest” filled with cards. Explain, “During today’s activities, we’ll become number explorers! By solving number problems, we’ll work to arrange our treasure in the right order.”

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2. Exploration Activity (15 minutes)

1. Partner Counting On (5 minutes):

   • Pair students up and give each pair a set of number cards from 11 to 20.
   • Ask one partner to shuffle the cards and the other to arrange them in the correct order (from 11 to 20).
   • Swap roles and repeat.
   • Encourage the use of a displayed number line for any pairs needing help.

2. Compare and Discuss (10 minutes):

   • Distribute laminated comparison symbols (>, <, =) to each pair.
   • Pose comparison problems aloud: e.g., “Which is greater: 14 or 18?” Students select the right comparison symbol and place it between the corresponding cards.
   • Challenge pairs to make up their own comparison challenges for the pair next to them. This promotes inter-pair collaboration and critical thinking.

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3. Group Task (20 minutes)

“Treasure Chest Number Sort” Activity (Whole Class):

1. Divide students into five groups of six.
2. Each group receives counters and number cards from 11–20 drawn randomly from the treasure chest.
3. The task: Groups must work together to:
   • Sort their number cards in order (smallest to largest).
   • Use counters to represent each number. For example, for the card 15, the group places 15 counters next to the card.
4. Groups then present their ordered sets to the class, explaining how they arranged and checked their numbers.
5. Provide guidance and celebrate collaboration by highlighting good teamwork and mathematical language use.

Extension Option (for early finishers):
Challenge students to shuffle their cards and arrange them in descending order (from 20 to 11).

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4. Consolidation and Review (10 minutes)

1. Quick Quiz (5 minutes):

   • Pose rapid-fire questions to the class:
     • “What comes after 17?”
     • “Which is greater, 12 or 19?”
     • “What’s one less than 14?”
   • Use mini whiteboards so all students can write and display answers simultaneously.

2. Reflection Discussion (5 minutes):

   • Ask open-ended questions:
     • “What was easy about counting from 11 to 20?”
     • “What helped you when comparing two numbers?”
   • Invite a few students to share their thoughts with the class.

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Assessment Opportunities

1. Observe students during pair and group activities to assess understanding of counting and comparing numbers.
2. Use the quick quiz at the end of the lesson to gauge individual progress.
3. Listen for correct use of mathematical language like “greater than,” “less than,” and “equal to.”

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Differentiation

• For students needing support: Provide access to the displayed number line throughout activities. Pair them with a stronger peer who can model the tasks. Offer smaller comparison tasks (e.g., using just three or four numbers).
• For advanced learners: Introduce word problems involving numbers 11-20 (e.g., “If I have 12 counters and add 3 more, how many will I have?”).

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Homework (Optional)

• Ask students to practise counting aloud with a family member from 11 to 20 and back again.
• Encourage students to create their own comparison problems to share with the class during the next lesson.

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Teacher Reflection

After the lesson, reflect on:

• Were students able to confidently count from 11 to 20?
• Did they effectively collaborate during the treasure chest activity?
• Were any students struggling, and how can they be supported in the next lesson?

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This engaging and hands-on lesson helps Year 1 students strengthen their understanding of numbers 11 to 20, building a strong foundation for further mathematical concepts. It’s structured to align with UK curriculum standards and encourages teamwork, critical thinking, and creativity.