The Interactive Textbook

Step-by-step explanations.

Examples, summaries and questions make concepts easy to understand.

Advanced Maths Testing

Questions include hints for guidance.


Enter formulas using panel or keyboard. Complex answers can be entered in several steps to lead to its final, simplest form.


Randomized questions allow students to practise solving difficult questions.

We can reliably check whether the answer is correct and in the right form.

Our question types can assess a wide range of skills, from matrices to arguments.

Animated Interactive Graphs

Graphs come to life with interactivity and animation.

Graphs build up step-by-step to make hard concepts easy to grasp.