Find error
Get sharp and find what's wrong.
Expose flaws in seemingly correct procedures. You'll learn not only to calculate correctly, but also to think like a real mathematician who checks every step.
About FindError4U
Do you want to be one step ahead of the rest? We've got 200 solved examples for you, and there's an error in almost every one of them. Look at them through the eyes of a detective and find where the problem lies. What's more, answer the question “Why is it wrong?”. Real understanding of mathematics is about being able to identify and explain the error. Examine ready-made solutions, look for weaknesses, and learn to recognise where and why the error occurred. In doing so, you will discover how different mathematical procedures and principles actually work, when and why they can be used, and how they relate to each other. This will train your critical thinking and you will no longer make mistakes that come from rote memorisation.
Teachers can print out the example and use it for group or cooperative learning in the classroom.