Maths in secondary school
The core secondary-school syllabus: functions, sequences, trigonometry, plane geometry and probability - step by step, up to the final exam. Once you have worked through a topic, you can test yourself on our exercises.
Materials
Open the lesson materials and start learning.
The course follows the national curriculum. New topics are added as we go - each with an explanation, a drawing and exercises to practise.
What you will learn
You understand where the rules come from instead of memorising them
You know when a rule must NOT be used - and why
You meet the typical mistakes before you make them in a test
After each topic you test yourself on exercises with step-by-step solutions
Who this course is for
A secondary-school student
The core syllabus, topic by topic - from year one to revision before the final exam.
A parent helping out
The "why it works" explanation helps when your child asks about something you no longer remember from school.
A teacher
A ready explanation, drawing and exercises to use in class or as homework.
How to use the materials
Read the lesson
Each lesson takes one topic and explains it from the "why it works" side, with drawings and worked examples. No account needed.
Work the examples yourself
Cover the solution, do it your own way, and only then compare. That is the difference that makes it stick.
Test yourself on exercises
Every curriculum topic has sets of exercises with step-by-step solutions. You can also open a blank PhiBoard and work the problem your own way.
Frequently asked questions
Is the course free?
Yes. Every lesson and exercise is free, with no account and no limits.
Is this course enough for the final exam?
The course covers the core secondary syllabus, the same material the basic-level exam checks. It is built topic by topic, and every topic comes with exercises and solutions.
Can I use the lessons in class?
Yes, you may use them when working with students. Please keep the attribution.
Are there exercises for this course?
Yes. Every curriculum topic has sets of exercises with step-by-step solutions - examples are drawn at random, so each set is different.