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Wanna win the OSN?
You’ve come to the right place! At KoncoSinau, we’ve got exactly what you need to supercharge your Olympiad preparation.

Whether you’re a beginner, or already a top student at school, we’ve got something for you.

Here’s why KoncoSinau’s Olympiad Course is the real deal:

Learn directly from national Olympiad winners

Weekly simulations and drills with real Olympiad-level questions

Interactive classes

Choose your subject:

Earth Science

All materials are updated to match the latest OSN syllabus.

What makes this course so special?
It’s fully online, but super interactive.
You won’t feel lost – every session is focused and clear.

Worried about the cost? Don’t be!
We’ve got various pricing plans to fit every budget.

Here’s what our past students say:

"I never thought I could compete at the provincial level, but KoncoSinau made it possible."

"I love how detailed the explanations are."

How to join? Super easy:

Visit course.koncosinau.id

Pick your subject and schedule

Begin your journey toward academic excellence

Still thinking? Time to take the leap.
Start now, thank yourself later.

Ready to start winning?
Join course.koncosinau.id today and show the world what you’re made of!