Preparing for GCSE Maths can feel overwhelming, and even capable students often lose marks by repeating the same avoidable mistakes. The good news? With the right awareness and strategies, your child can avoid these pitfalls and secure higher grades. Below are the five most common mistakes we see in GCSE Maths exams—and practical ways to avoid them.
1. Misreading the Question
Under exam pressure, it’s easy to skim-read and miss key details such as units, keywords, or instructions like “give your answer in standard form.” This can result in otherwise correct working being marked down.
Solution: Encourage your child to underline important words in the question. Slowing down for 5 extra seconds can save valuable marks.
2. Poor Time Management
Students often spend too long on one question, leaving easier marks behind. This can drag a grade down, even if the student knows most of the content.
Solution: Teach exam strategy, such as answering familiar questions first, skipping difficult ones, and returning later. At Owl Maths, we train students to use “reverse order tackling,” starting with higher-value questions to maximise marks efficiently.
3. Weak Algebra Foundations
Algebra is the backbone of GCSE Maths. Many students struggle because of small misconceptions in rearranging equations or expanding brackets, which create a ripple effect across the paper.
Solution: Build confidence by revisiting the basics of algebra step-by-step. A strong foundation ensures success in advanced problem-solving questions.
4. Forgetting to Show Working
Many students lose marks by jumping straight to an answer without showing how they got there. Examiners award method marks, meaning even partial working can earn points.
Solution: Train students to always write down the process. Even if the final answer is wrong, marks can still be earned for correct reasoning.
5. Over-Reliance on Calculators
While calculators are essential, over-reliance often leads to mistakes, especially when students don’t estimate answers mentally. For example, entering numbers incorrectly without checking can cost easy marks.
Solution: Encourage mental estimation before using the calculator. If the calculator answer doesn’t “make sense,” they know to check again.
Final Thoughts
GCSE Maths success isn’t just about knowing formulas—it’s about exam technique, discipline, and avoiding these common traps. By addressing these five mistakes early, your child can transform their approach and secure the grade they truly deserve. At Owl Maths, we specialise in helping students not only master the curriculum but also build the exam strategies needed to perform under pressure.