Korea Cut High School Grades From Nine Levels to Five, and Your Students Have Feelings About It
Starting with students who entered high school in March 2025, Korea's internal grading system (내신) moved from nine relative tiers to five, easing some of the ranking pressure but reopening arguments about fairness, effort, and whether it actually changes anything for college admissions.
Park English2026-09-103 min read
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For decades, Korean high schoolers have lived inside a nine-tier grading curve called naesin (내신). Get the top 4% on a test and you're a 1. Miss it by one rank and you might drop to a 2, and that gap can decide which university you get into. It's brutal, and everyone in the room already knows that, which is why this topic works without much warm-up.
From March 2025, the Ministry of Education folded that nine-tier scale down to five for incoming freshmen, as part of the wider rollout of the "high school credit system" (고교학점제). The top band now covers roughly the top 10% instead of the top 4%. On paper, that means fewer students get pushed into a lower grade over a single wrong answer.
But it hasn't settled the argument. It's shifted it.
Why This Actually Splits a Classroom
Ask ten students and you'll get real disagreement, not the polite kind teachers are used to managing. Some think the wider bands finally let them breathe. Others think it just means everyone crowds into grade 1 and the real sorting happens somewhere else — through the suneung, through essay rounds, through private tutoring that costs a lot more than a school test does. Neither side is wrong, and that tension is the whole lesson.
| Argument for the 5-tier system | Argument against it |
|---|---|
| Fewer students lose a grade over one test question | Grade 1 now includes far more students, so it stops meaning much on its own |
| Less daily anxiety about small rank changes | Universities may lean harder on other factors, like essays or interviews, which favor students who can afford coaching |
| Matches the credit-based, less test-centered model schools are moving toward | Nobody has finalized exactly how 2028 admissions will weight the new scale, so seniors are planning around a system still being built |
We genuinely don't know yet how selective universities will recalibrate their admissions formulas for this cohort. Neither do the students. That uncertainty is worth saying out loud in class rather than papering over.
Running the Lesson (45 minutes, adult-level English required)
- Warm-up (5 min): Ask students to rate, 1 to 5, how much pressure they feel about grades this semester compared to last year. Write the average on the board.
- Input (10 min): Read the handout aloud together. Check vocabulary: "tier," "curve," "admissions."
- Small groups (15 min): Split into pairs — one argues the 5-tier system helped students, one argues it just moved the problem. Each pair needs two supporting points from the handout, not just an opinion.
- Class debate (10 min): Two or three pairs present. Push back with a real follow-up question each time, not just "good job."
- Wrap (5 min): Return to the 1-5 pressure question from the warm-up. Ask if anyone changed their number and why.
Keep the pace moving. This topic runs hot in Korean classrooms, and a slow open kills the energy before the debate stage.