Completing a past paper and moving on is one of the biggest mistakes students make. The Traffic Light method turns every marked paper into a targeted revision plan for what matters most.
The typical past-paper routine goes like this: complete the paper, check your answers, cringe at the mistakes, close the tab, move on. Sometimes you skim the marking guidelines for thirty seconds before deciding you mostly understand where you went wrong. Then you do the next paper and repeat the process.
This approach treats past papers as a performance measure rather than a learning tool, which wastes most of their value. Your mistakes are your most valuable study data — but only if you use them systematically. The Traffic Light method is a simple tagging system that turns every marked paper into a precise revision roadmap.
After marking any piece of work — a past paper, a practice test, a worksheet — go through every question and assign it one of three colours based on your honest assessment of your understanding:
Green — Solid. You got it right and you know exactly why. You understand the concept fully and could explain your reasoning step by step. These questions require no further revision right now.
Yellow — Shaky. Either you got it right but relied on partial understanding or a lucky guess, or you got it wrong but now understand the correct approach after reading the solution. These need revisiting before the exam.
Red — Blind spot. You got it wrong and you still don't fully understand why, even after checking the marking guidelines. These are your highest-priority revision targets.
The tagging is only half the system. The second half is how you use it. Red questions go into a dedicated notebook — separate from your regular notes — along with a short explanation of where you went wrong and what the correct approach is. This becomes your pre-exam review document. The night before an exam, you're not reviewing everything. You're reviewing only the red and yellow questions you've accumulated over weeks of past-paper practice.
This is how you stop wasting revision time on content you already know. Most students spend roughly equal time across all topics, regardless of how well they understand them. The Traffic Light method forces your effort toward the areas that will actually move your mark.
The most important insight this system offers isn't the colour-coding — it's the honest self-assessment it demands. Many students avoid thinking carefully about why they got something wrong because it's uncomfortable. The Traffic Light method makes that reflection mandatory. You can't tag a question red without admitting you genuinely don't understand it yet, and that admission is the first step toward fixing it.
You can't fix what you can't see. Apply this system to your next past paper and watch your revision become dramatically more targeted in under ten minutes.
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