Directed Numbers — Interactive Lesson (Ages 11–14)

Do your students lose track of the signs? This 38-slide interactive lesson takes KS3 students from representing directed numbers on a number line to calculating with them confidently.

Mastering Directed Numbers in Year 7–9 Maths

Students learn that a directed number is written with a positive or negative sign, and that 5 is really +5. They use a number line to add and subtract, for example −2 + 5 = 3 and 5 − 8 = −3, then move to the rules for like and unlike signs so they can calculate without the line. The lesson goes on to multiplication and division, evaluating algebraic expressions and solving two-step equations.

What’s Included

• 38-slide interactive lesson on directed numbers
• Learning objectives from representing and ordering to multiplying and dividing
• Number line methods for adding and subtracting across zero
• Rules for combining like and unlike signs
• Algebraic expressions and two-step equations with directed numbers

Key Benefits for Students

• Builds a secure picture of positive and negative numbers
• Moves from the number line to reliable written rules
• Extends into algebra with directed numbers
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• A long, structured lesson that can be split across sessions
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A dependable foundation for KS3 algebra

Love this? You’ll love…

• Formal Methods: Adding Integers — Interactive Lesson (Ages 11–14)
• Collecting Like Terms — Interactive Lesson (Ages 11–14)
• Order Of Operations — Interactive Lesson (Year 7)

A dependable addition to a KS3 number and algebra topic, giving students a clear route from the number line to written rules. Confidence with directed numbers is one of the biggest predictors of success in later algebra.

Build confident number skills today — Add to Basket.

FAQ

What year group is this for? KS3 — Years 7–9 (ages 11–14).

Does it cover multiplying and dividing? Yes — after adding and subtracting, it covers multiplication and division of directed numbers.

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