How to Set a Fair Exam With a Clear Marking Scheme

A fair exam tests what you actually taught, at the level you taught it, and is marked the same way for every student. The marking scheme is what makes that possible. Here is a practical process you can follow for any subject.

List what the exam must cover

Before writing a single question, list the topics and skills from the term. Next to each, note how much time you spent on it and how important it is. The exam should reflect that balance: a topic that took three weeks should not be worth a single question.

A simple table with topics down the side and skills across the top, such as recall, application and reasoning, helps you see gaps and avoid setting five questions on the same idea.

Mix question types and difficulty

Include a few accessible questions so that every student can show something, a core of medium questions that most of the class should manage, and a small number of harder ones that separate the strongest students.

Use the command words your students will meet in official exams, such as state, explain, calculate and discuss. Students should know what each word asks them to do before the exam, not during it.

Write the marking scheme at the same time

Write the answer and the mark allocation as you write each question. If you cannot write a clear answer, the question is probably unclear or too open. Fixing it now is far easier than arguing about it while marking.

For each question, show where each mark is earned: a correct formula, a correct substitution, a correct answer with its unit, a valid reason. Students lose marks for specific missing steps, and your scheme should say which ones.

• One mark for one clear idea or step
• Accept correct alternative methods
• Say how to treat a wrong answer that follows from an earlier mistake

Check timing and length

Do the exam yourself, or imagine a good student doing it, and note how long it takes. A common mistake is setting too much for the time available, which punishes slow writers rather than weak understanding. Aim for an exam that a prepared student can finish with a few minutes left to check.

Mark consistently

Mark one question at a time across all scripts instead of one script at a time. You will apply the scheme more evenly and spot patterns in common errors. If you notice an answer the scheme did not expect, decide how to treat it, write the decision down and apply it to every script.

Take short breaks. Marking quality drops when you are tired, and the last scripts deserve the same care as the first.

Use the results to teach better

After marking, list the questions most students lost marks on. Those are not only student failures; they show what to reteach or explain differently. Share a short feedback summary with the class and go through the most common mistakes.

LessonForged can build an exam from your topics together with an answer key and marking scheme, which gives you a solid first draft. You should still read every question, adjust the difficulty to your class and confirm that the scheme matches what you taught.

Frequently asked questions

Plan coverage first, write the marking scheme with each question, check the timing and mark one question at a time. Then use what the results show to plan your next lessons.