Algebra
Letters that stand for numbers — expressions, equations and functions.
01Introduction to AlgebraWhat algebra is and why letters beat numbers.Read lesson →02VariablesNamed boxes that store values you can reuse and change.Read lesson →03ExpressionsSimplifying, expanding and collecting like terms.Read lesson →04Linear EquationsSolve for x: one step, two steps, both sides.Read lesson →05Quadratic EquationsWhen x² appears: factorising and the quadratic formula.Read lesson →06FunctionsMachines that turn inputs into outputs.Read lesson →