🔤 Ages 11 to 16 · Class 7 to 10
Algebra you can see and move
Equations, slope, systems, quadratics and Pythagoras: algebra made visible with balances, lines and curves.
Algebra feels abstract until you can see it. In these lessons an equation is a balance you can tip, a system of equations is two lines that cross, and a quadratic is a curve whose crossing points you can slide into place.
Start with solving equations, then slope and systems, and finish with parabolas. Every lesson ends with questions that check the idea and a target you have to hit by yourself.
Interactive learning path
Algebra: 5 lessons to do
Choose a lesson and explore the idea with diagrams, controls and guided questions.
Solving Equations
Keep a balance level to solve equations like 2x + 3 = 11.
Start the lesson →Slope and Straight Lines
Change m and b and watch the line y = mx + b move on a grid.
Start the lesson →Systems of Equations
See where two lines cross to solve two equations at once.
Start the lesson →Quadratics and Parabolas
Slide a parabola's vertex and find where it crosses the x-axis.
Start the lesson →The Pythagorean Theorem
See a² + b² = c² with squares on the sides of a right triangle.
Start the lesson →Covered topics
What this area covers
Where to start
- Ages 11 to 13: Start with solving equations on the balance, then slope and lines.
- Ages 13 to 15: Try systems of equations and the Pythagorean theorem.
- Ages 14 to 16: Finish with parabolas, then the quadratic equations notes.
Practise next
Want a teacher to guide you through algebra? See Maths exam preparation with a teacher. Teachers in our network teach every class and board, and a teacher is matched to the learner before anything is booked. We do not promise marks, grades or results.
FAQ
Algebra: questions people ask
Which algebra lesson should I start with?
Start with solving equations. It builds the rule that appears in every other algebra lesson: do the same to both sides.
Do these lessons cover quadratic equations?
Yes. The parabolas lesson shows the shape, vertex and roots, and the topic notes teach factorising and the quadratic formula.
Are the answers checked?
Yes. Every diagram and every answer in the lessons is checked by automated tests.
Can a teacher help with algebra?
Yes. Teachers in our network teach algebra for every class and board. Tell us the class and what feels hard.
Keep exploring
Other areas
Foundations
Number sense, fractions, percentages, shapes, counting and sets: the ideas every later topic stands on.
See the lessons →Probability and Statistics
Probability, averages and correlation: how to measure chance and what a pattern in data can and cannot tell you.
See the lessons →Calculus
Rate of change and area under a curve: the two big ideas of calculus, seen before they are symbolised.
See the lessons →Mind-Bending Maths
Puzzles, counting, binary, clock arithmetic and codes: the playful side of maths that school rarely has time for.
See the lessons →Start a conversation
Want help with algebra?
Tell us the age, topic and what feels hard. We match a teacher from our network and confirm the format before anything is booked.
- Tell us the learner’s age or grade and goals
- We’ll suggest a suitable class or learning path
- We’ll confirm format, timing and fees with a parent or guardian
Play it, don't just read it
Take a break and play
Free games that need no sign-up. Pick one and play for five minutes.
Pick a game
- Function MachineFeed numbers into a mystery machine, plot what comes out, then crack its…Play
- Algebra 2: Functions & Linear ModelsFollow the full Chapter 2 path: functions, slope, line graphs, direct…Play
- Algebra QuestTravel from order of operations and expressions to equations, functions…Play
- Number SequencesSpot the pattern and type the next number. Add, multiply, squares,…Play