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I built Da•hand•in not as a CEO, but as a classroom teacher who needed it too. 

Like many teachers, I was tired.
Tired of chasing down submissions, juggling endless tabs, trying to figure out who needed help — and who was just quiet.

During the pandemic, the distance between us and our students felt wider than ever.
I needed something to bring us back together —
a way to see their work, respond with heart, and remind them:
"I see you. I hear you. You're growing."

So I began building.
Not as a developer, but as a teacher who cared.

Da•hand•in wasn’t born out of tech ambition.
It came from a messy desk, late nights, and a heart full of students I didn’t want to lose track of.

Today, over 60,000 teachers and 1.13 million students use the platform in Korea.
But honestly?
We still build like it’s day one —
with chalk on our hands and students on our minds.

From one teacher to another — this is for you.

Let’s make room for what matters again.