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  How to Best Prepare Your Child to Face the Mathematics National Science Olympiad?
  
  
  This question often comes up by many parents I’ve met, even from fellow teachers.
  
  The Mathematics OSN is known as a very competitive
  competition, with problems that demand advanced thinking skills.
  So, what is actually the best way to prepare children for this competition?
  
  I personally had an experience when my friend’s younger brother tried to join the Mathematics OSN at the district level.
  At first, he studied the conventional way: solving practice problems, reading books, and discussing with friends.
  
  But the results were not very satisfying. After trying intensive tutoring through a private teacher, the results were completely different.
  
  
  Is OSN Preparation the Same as Learning Math at School?
  
  
  One thing that must be understood: preparing for OSN is not the same as learning math daily at
  school.
  
  According to research from Stanford University, competition-based learning demands higher-order thinking skills
  that differ from regular classroom learning
  (Resnick, 1987). OSN emphasizes analysis, creativity,
  and the ability to connect concepts across topics.
  
  That’s why students who rely only on school lessons often feel overwhelmed.
  They need different strategies—and this is where guidance from private tutors such
  as those at NgajarPrivat.com becomes extremely helpful. OSN tutors are used to giving more challenging exercises, not
  just ordinary school exam problems.
  
  Why Are Private Tutors More Effective for Olympiad Preparation?
  
  I once talked with a private tutor from KoncoSinau.id who has been mentoring Olympiad students for
  more than ten years. He said that many kids are already smart, but without the right guidance,
  they are like “lost” in the jungle of Olympiad
  problems.
  
  This aligns with research from the Educational Testing Service (ETS), which showed that personalized learning improves conceptual understanding by up to
  30% compared to large classrooms (Bloom, 1984). Private tutors can quickly identify student
  weaknesses—whether in number theory, combinatorics,
  or geometry—and address them through a personalized approach.
  
  
  I still remember when that student failed on a solid geometry problem.
  His private tutor didn’t just teach formulas for volume but also connected
  it with 3D visualization. With that approach,
  the child understood much faster.
  
  What’s the Difference Between Online and Offline OSN Private Lessons?
  
  
  Another classic question is: which is better, online or offline OSN tutoring?
  
  
  From my experience, both have advantages. Offline (face-to-face at home) offers comfort and full focus.
  Meanwhile, online provides access to the best tutors from different cities.
  
  
  Research from MIT shows that blended learning (a combination of online and offline) produces
  better learning outcomes compared to a single method (Means et al.,
  2013). So the issue isn’t which is better, but rather how comfortable the child feels and whether
  they can stay consistent.
  
  At LapakGuruPrivat.com, for example, there are options for tutors to come
  to the house for children who need direct guidance,
  and Zoom/Google Meet sessions for those in other cities.
  From my family’s experience, this flexibility is very helpful, especially when OSN preparation time is tight.
  
  
  How Important Is Practice in OSN Preparation?
  
  Working on exercises is indeed important, but
  it’s not just about the quantity of problems.
  According to research by Ericsson et al. (1993), what matters more is deliberate practice—practice that is structured and comes with
  direct feedback.
  
  I personally witnessed how my friend’s younger brother used to complete 50
  OSN problems in a week, but his progress was slow.
  
  Once he joined an intensive program at NgajarPrivat.com, the number of problems became fewer, but each
  one was discussed deeply with different strategies. As a result, he quickly learned to recognize patterns.
  
  
  Private tutors usually have OSN problem banks from previous years, and even international Olympiads.
  This allows students to become familiar with various levels of difficulty.
  
  
  Can OSN Tutoring Shape a Child’s Character?
  
  
  Many parents think private tutoring is only for academic improvement.
  But from my experience, OSN preparation also helps build character.
  
  
  According to a study from the University of Indonesia, Olympiad
  participants have higher levels of grit and resilience compared to regular students (Putri,
  2019). This is because they are used to facing tough problems and not giving up until
  they find the answer.
  
  I personally saw the student I mentored become more patient, more diligent, and
  more confident after attending OSN private lessons.
  So the benefit is not only winning competitions, but also
  developing traits that carry into everyday life.
  
  
  
  Which OSN Math Tutoring Platforms Can Be Trusted?
  
  
  Nowadays, there are many tutoring platforms, but from my personal
  experience, three are worth recommending:
  
  – **NgajarPrivat.com** → Ideal for intensive guidance, especially for students who prefer
  face-to-face interaction.
  – **KoncoSinau.id** → A great option for students who are
  more comfortable with online learning, supported by flexible and experienced tutors.
  
  – **LapakGuruPrivat.com** → Offers various OSN subjects,
  not only mathematics. Perfect for families with children who have different academic interests.
  
  
  All these platforms have proven successful in helping many students reach the national stage.
  Interestingly, many of the tutors are OSN alumni or top university students from places like UI and ITB.
  
  
  Conclusion: Should Students Take OSN Private Lessons?
  
  If asked whether it’s mandatory, the answer is no. Many outstanding students succeed through
  self-study. But in terms of time efficiency, the right strategies, and higher chances of success,
  OSN private tutoring is clearly a wise choice.
  
  With guidance from experienced tutors on platforms like NgajarPrivat.com, KoncoSinau.id,
  or LapakGuruPrivat.com, students are not only
  ready to tackle Olympiad problems but also equipped with the mental strength to face future academic challenges.
  
  
  
  In my view, this investment is absolutely worth it.
  Because in the end, OSN is not only about winning medals,
  but also about shaping a young generation ready to compete
  at the global level.
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