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Maths

KS3-style Maths 11–14

A KS3-style maths course for ages 11–14: powers and primes, fractions and percentages, expanding and factorising, straight-line graphs, angles and circles, Pythagoras, first trigonometry, probability and statistics. Original questions, typed exact answers and worked solutions.

Start the programmeTake the check-up
Ages 11–145 levels · 54 lessonsAbout 5 minutes a lessonFree to start

Level 1 · Unit 1

The first steps on the path

Lessons unlock one after another. Done lessons stay open for extra practice.

Try a sample lesson

This is how the first lesson starts. Sign in to play it and save stars.

Learn

Primes, HCF and LCM

About 5 minutes

How it works

A power is repeated multiplying: 2³ = 2 × 2 × 2 = 8. A prime has exactly two factors: 1 and itself.

  • Example 1

    Find the highest common factor (HCF) of 24 and 28.

    Answer: 4

  • Example 2

    Write 56 as a product of its prime factors.

    Answer: 2³ × 7

Let’s practise

What’s inside

5 levels · 11 units · 54 lessons. Each unit ends with a check-up that unlocks the next one.

Level 1 · Number

  1. Powers, roots and primes · 5 lessons

    • Primes, HCF and LCM
    • Indices
    • Standard form
    • Primes, HCF and LCM · Challenge
    • Indices · Challenge

  2. Fractions, percentages and proportion · 5 lessons

    • Recurring decimals
    • Reverse percentages
    • Proportion
    • Reverse percentages · Challenge
    • Proportion · Challenge
Level 2 · Algebra

  1. Expressions and brackets · 5 lessons

    • Simplifying expressions
    • Expanding brackets
    • Factorising
    • Index laws with letters
    • Expanding brackets · Challenge

  2. Sequences, formulae and inequalities · 5 lessons

    • nth term rules
    • Rearranging formulae
    • Inequalities
    • nth term rules · Challenge
    • Rearranging formulae · Challenge
Level 3 · Graphs

  1. Coordinates and straight lines · 5 lessons

    • Midpoints and lengths
    • Reading graphs
    • Gradients
    • Equations of lines
    • Gradients · Challenge

  2. Line equations and real-life graphs · 5 lessons

    • Equations of lines
    • Distance–time and velocity–time graphs
    • Simultaneous equations
    • Reading graphs
    • Distance–time and velocity–time graphs · Challenge
Level 4 · Geometry and measures

  1. Angles, circles and solids · 5 lessons

    • Circle theorems
    • Arcs and sectors
    • Cones, spheres, pyramids
    • Arcs and sectors · Challenge
    • Cones, spheres, pyramids · Challenge

  2. Pythagoras, similarity and vectors · 5 lessons

    • Pythagoras (decimals)
    • Similar shapes
    • Vectors
    • Pythagoras (decimals) · Challenge
    • Similar shapes · Challenge

  3. First trigonometry · 4 lessons

    • Right-angled triangles
    • Elevation and bearings
    • Exact values
    • Trigonometry: Mixed (by level)
Level 5 · Probability and statistics

  1. Probability · 5 lessons

    • Single events
    • Sample spaces
    • Venn diagrams
    • Two-way tables
    • Tree diagrams

  2. Statistics · 5 lessons

    • Quartiles and spread
    • Grouped data
    • Scatter graphs
    • Comparing and sampling
    • Quartiles and spread · Challenge

About this programme

The course follows the topics of the English Key Stage 3 programme of study (roughly US grades 6–8) and climbs in difficulty inside every unit: the first lessons use Year 8-style questions, the last ones Year 9-style questions.

Crayonbird is not linked to any exam board. Every question is original and generated by code, and the answer keys are worked out exactly, so they are always right.

Questions grown-ups ask

Where should I start?

Take the GCSE-style maths check-up (about 15 questions). It adapts to your answers and suggests a programme and level, from KS3-style to GCSE-style Higher.

How do I type answers like √12 or x ≥ 3?

A maths keypad under each answer box has √, powers, fractions, π, brackets and ≤ ≥. Answers are checked by value, and you get a nudge when the value is right but not yet in its simplest or factorised form.

How long is a lesson?

Most lessons take 5 to 10 minutes: a short learn card, practice that is marked as you go, and often a quick game. Little and often works best.

Do children need an account?

A grown-up signs up and adds a child profile; children never need an email or password. Class students sign in with their class code and PIN.

Is the practice the same every time?

No. Every practice step is generated fresh, so a child can repeat a lesson as often as they like and still get new questions.

Can I see how my child is doing?

Yes. The parent dashboard shows each programme, the level, stars, when your child last practised, and the skills that are going well or need more work.

Can I print the lessons?

Lessons are made for the screen, but every practice sheet can also be printed from the worksheet maker.

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