Replacing teachers with AI tutors: a discussion lesson for Korean high schoolers who've seen the apps their parents already bought

This one lands differently in Korea than it does in most places. Your students aren't speculating about a distant future — half of them have a monthly AI tutor subscription their parents signed up for, and the other half have used ChatGPT to check their writing at least once this week. The question isn't whether the technology exists. It's whether you'll still have a job in three years, and whether they'll miss you.

Run it as a structured debate with assigned sides, not an open discussion. When the topic is this close to home, students will say what they think you want to hear unless you force them to argue the other direction.

What you need

Print two sets of argument cards, one FOR replacing teachers with AI and one AGAINST. Four cards per side is enough. Divide the class in half and distribute the cards randomly — students argue the side they're given, not the side they agree with.

Give them eight minutes in pairs to prepare. They can add their own arguments but they must use the ones on the cards. Then run it as a mini-debate: two minutes per side, one rebuttal each, and a class vote at the end. Vote twice — once for which side argued better, once for which side they personally agree with. The gap between those two numbers is the interesting part.

Argument cards — FOR replacing teachers

Card 1: Consistency AI tutors give the same quality of feedback whether it's 9am or 11pm, whether they're tired or not, whether they like you or not. Human teachers have bad days. AI doesn't.

Card 2: Personalization at scale An AI tutor can adjust to your exact level in real time, slow down when you don't understand, repeat things fifteen times without getting annoyed. A teacher with thirty students can't do that for everyone.

Card 3: Cost A monthly Ringle subscription costs less than one hagwon class. If AI can teach grammar and check essays for ₩30,000 a month, why pay ten times that for a classroom?

Card 4: Access Students in rural areas or small cities get the same AI tutor as students in Gangnam. You don't need to live near a good hagwon anymore.

Argument cards — AGAINST replacing teachers

Card 1: Motivation Students don't show up for an app the way they show up for a person. AI can check your grammar but it can't tell when you're about to give up, and it can't make you care.

Card 2: Real conversation You can't debate with software. You can't argue about whether something is funny, or rude, or means two things at once. Language is social. AI tutoring is just expensive homework.

Card 3: Cultural context A teacher who has lived in Korea knows why you're translating that sentence word-for-word from Korean. An AI tutor sees the mistake but doesn't know where it came from, so the correction doesn't stick.

Card 4: What parents are actually paying for Parents pay for hagwons because someone is making their child sit down and study for ninety minutes. An AI app on a phone is something you can close when it gets hard. Teachers don't let you quit.

After the vote

Ask: How many of you have used an AI app to help with English this month? Then: How many of you would take an online-only class with no human teacher if it cost half as much?

The answers will split the room. Let them argue with each other for five minutes, no structure. You'll hear things they didn't say during the formal debate.

Follow-up questions (pick two)

• If AI tutors become as cheap as textbooks, should schools stop hiring foreign English teachers and spend the money on something else?
• Would you work harder for a teacher or for an app? Why?
• If you could design the perfect English teacher — half human, half AI — what would you keep from each?

What to do when a student says they already use ChatGPT for essays

Don't flinch. Ask the class: If a company interviewed someone who used AI to write their application, should they hire that person? Let them argue it out. This is the actual dilemma they're going to face in three years, and the ones who've thought it through will eat the ones who haven't.

The debate usually ends with the class agreeing that AI is useful but shouldn't replace teachers entirely — which is the safe answer, and not necessarily what they believe. The second vote, the one where you ask what they'd actually choose if it cost half as much, is the one that tells you what they think when you're not in the room.