OSN SD
OSN Coaching Mathematics SD
Counting, patterns, and reasoning with numbers.
Mathematics Primary coaching builds conceptual understanding first, then trains reasoning through graded problems, from school level to the OSN selection.
Who it's for
Primary students who want to take part in the OSN Mathematics field, whether beginners or returning participants.
Stages & test format
OSN-S (School)
2 January – 28 February 2026Selection at each school; schools register up to 5 students per field.
OSN-K (District/City)
8 June 202630 multiple-choice questions
Duration: 60 minutes
OSN-P (Province)
6 July 202620 short-answer questions
Duration: 60 minutes
National Semifinal
13 August 2026 (online)15 short-answer questions + 5 essay questions
Duration: 90 minutes
National Final
25–31 August 2026 (in person)Theory 1: 25 short answer · Theory 2: 13 essays · Exploration: 6 questions
Duration: 60 + 90 + 120 minutes
What you'll study
- Bilangan
- Pola
- Geometri dasar
- Pengukuran
- Penalaran
Assessment
Weekly practice with explanations
Short quizzes per topic
Official-style selection simulations
Source: 2026 OSN Guidelines for Primary (Pusat Prestasi Nasional). Dates may change, always check official Puspresnas announcements.
FAQ OSN Mathematics SD
01What does OSN Mathematics SD cover?
Bilangan, Pola, Geometri dasar, Pengukuran, Penalaran
02What are the OSN Mathematics SD stages and formats?
OSN-S (School) (2 January – 28 February 2026): Selection at each school; schools register up to 5 students per field.. OSN-K (District/City) (8 June 2026): 30 multiple-choice questions, 60 minutes. OSN-P (Province) (6 July 2026): 20 short-answer questions, 60 minutes. National Semifinal (13 August 2026 (online)): 15 short-answer questions + 5 essay questions, 90 minutes. National Final (25–31 August 2026 (in person)): Theory 1: 25 short answer · Theory 2: 13 essays · Exploration: 6 questions, 60 + 90 + 120 minutes.
03Who is OSN Mathematics SD training for?
Primary students who want to take part in the OSN Mathematics field, whether beginners or returning participants.
04Is there online OSN Mathematics SD training?
Yes. OSN Mathematics SD training at Presisi Academy runs online with live classes, graded practice, and selection simulations. In-person classes are coming soon.