How to Instill Interest in Your Students — What Duolingo Knows That Most Music Teachers Don't

You've had that student. The one who shows up, plays through the pieces, ticks the boxes — and yet something is missing. No spark. No curiosity. No moment where they lean forward and say, "Can we try that again?"

Getting a student to practice is one thing. Getting them to want to practice is another problem entirely.

In 2006, psychologists Suzanne Hidi and K. Ann Renninger published a framework that explains how interest actually develops in learners. It's called the Four Phase Model of Interest Development. Duolingo built much of its retention strategy around it — and once you understand it, you'll see it everywhere.

Interest isn't a trait. It's a process.

Most of us treat interest as something a student either has or doesn't. But Hidi and Renninger's research says otherwise: interest develops in four stages, and teachers can influence every one of them.

Phase 1: Triggered situational interest. Something catches the student's attention — new, surprising, or slightly challenging. This is the spark. It's fragile and depends entirely on what's happening right now.

Phase 2: Maintained situational interest. The spark doesn't die out. The student stays engaged because something keeps feeding it — the content, your feedback, a sense of progress.

Phase 3: Emerging individual interest. It becomes personal. The student connects music to their own identity and goals. They start seeking it out on their own.

Phase 4: Well-developed individual interest. This is the student who practices without being told. Who asks questions you didn't expect. This phase can genuinely shape who they become.

Most teaching happens almost entirely in Phases 1 and 2. We trigger interest with new pieces, maintain it with structure — and then wonder why students quit when the external scaffolding disappears.

What Duolingo figured out

Duolingo has over 500 million users. Its retention rates are unusually high for an educational product. That's not an accident.

To trigger interest, it offers over 40 languages — including Klingon. The first few lessons are short, playful, immediately rewarding. To maintain it, the app gives constant feedback: points, streaks, level-ups. You always know where you stand. To foster emerging individual interest, learners customize their goals and pace. The app starts to feel less like a course and more like a personal project.

The whole thing is engineered to move people through the phases — not just get them in the door.

What this looks like in a music lesson

You don't have a cartoon owl. But you have a real relationship, a physical instrument, and the ability to read the room in real time.

Triggering interest is about novelty and surprise. Play them something unexpected — a jazz version of a piece they know, a composer they've never heard. Ask what they notice. Let them try something before you explain it. Students who choose their own repertoire, even partially, show up differently.

Maintaining interest is where structure and feedback matter most. Break pieces into achievable chunks. Celebrate small wins. Make sure they leave each lesson with something concrete they can do. Vague encouragement doesn't maintain interest. Specific feedback does: "your left hand stayed steady through that whole phrase — that's new."

Fostering emerging individual interest is about connecting music to who the student actually is. For a teenager who loves film scores, it might mean talking about Hans Zimmer. For an adult learner returning to piano, it might mean exploring the composers they grew up hearing. The question isn't "how do I make them interested in music?" It's "how do I connect music to what they already care about?"

The phase most teachers skip

Phase 2 — maintaining situational interest — is where most students quietly disengage. The novelty wears off around weeks four to eight. Progress feels slower. The student isn't sure they're getting better.

Make progress visible. Record a run-through at the end of a lesson so they can hear themselves. Or just say: "Three months ago you couldn't play this at all. Listen to what you just did."

Interest isn't fixed. It develops in stages, and teachers can influence every one of them. Trigger it with novelty and choice. Maintain it with specific feedback and visible progress. Deepen it by connecting music to who the student actually is.

Further reading: Hidi, S., & Renninger, K. A. (2006). The four-phase model of interest development. Educational Psychologist, 41(2), 111–127.