Here's your chance to have a go at some of the toughest A-level maths questions in papers from the past six years from exam boards AQA, Edexcel and OCR.

Revise sketching a quadratic function for your National 5 maths exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors.

In this article, we look at some great resources that explain the maths concept of functions really well.