Comparing Numbers: One Less — Interactive Lesson (Ages 5–6)

What is one less than 11? This 38-slide interactive lesson teaches Year 1 children how to find 1 less than a number.

Learning One Less in Year 1 Maths

Children learn to identify 1 less than a given number, and to count and draw 1 less of a number. Story problems make it concrete: Mrs Craig has 11 cakes and gives one away, Peter Rabbit drops one of his 9 carrots, and an orange falls off a tree. Children also put sweets in a jar to show 1 less than another jar and choose the correct number card to complete a 1-less statement.

What’s Included

• 38-slide interactive lesson on one less
• Learning objectives on identifying, counting and drawing 1 less
• Story problems with cakes, cookies, carrots, frogs and oranges
• Drag-and-drop tasks with sweets in jars
• Number-card questions with instant feedback

Key Benefits for Students

• Builds understanding of 1 less through pictures
• Strengthens counting back by one
• Uses familiar stories and objects
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• A long lesson with plenty of repeated practice
• Self-marking questions support independent practice
• Suits small groups and whole-class sessions
• Pairs well with cubes and counters

Love this? You’ll love…

• Counting Objects — Interactive Lesson (Ages 5–6)
• Adding and Subtracting Single Digits — Interactive Lesson (Ages 5–6)
• Addition, Subtraction and Equal Symbols — Interactive Lesson (Ages 5–6)

A dependable addition to a Year 1 number topic, giving children plenty of practice with one less before they meet larger number patterns. Knowing 1 less and 1 more helps mental calculation later.

Make counting back easy — Add to Basket.

FAQ

What year group is this for? Year 1 (ages 5–6).

Does it cover one more? No — this lesson focuses on 1 less.

Is it self-marking? Yes, with instant feedback on the questions.