OSN Math: where to start (an 8-week plan)

Parents often ask the same question: my child is interested in OSN — where do we actually begin?

You do not need a giant syllabus on day one. You need a calm starting plan, a few high-leverage topics, and a weekly rhythm that builds reasoning rather than rushing through worksheets.

This plan is for students who already handle school maths reasonably well and want a serious first block of olympiad-style practice.

What “ready for OSN prep” looks like

A useful starting point is not “finished the whole textbook.” It is closer to this:

• Comfortable with fractions, integers, and basic algebra manipulation
• Willing to sit with a hard problem for 10–15 minutes before asking for help
• Able to explain why an answer works, not only what the answer is

If those are shaky, strengthen them first. Olympiad work amplifies gaps; it does not hide them.

The 8-week shape

Think in two phases:

1. Weeks 1–4 — foundations for contest thinking
   Number sense, careful reading, short proofs of “why,” and one clean write-up habit.
2. Weeks 5–8 — contest-shaped practice
   Mixed sets, timed blocks, and reviewing wrong answers as the main study material.

Keep the weekly load sustainable. For most students, 3–5 focused hours per week beats a weekend cram.

Weeks 1–2: Number sense and careful reading

Focus on:

• Divisibility, remainders, and primes at a basic level
• Reading every condition in a problem before calculating
• Writing one short reason for each key step

Parent tip: ask “What is the question asking for?” before “What is the answer?”

Weeks 3–4: Structure and representation

Focus on:

• Organising information with a table, diagram, or cases
• Elementary counting (without rushing into advanced combinatorics)
• Checking a result with a small example

A good habit: after solving, spend two minutes on another valid approach — even a slower one. Flexibility matters more than speed at this stage.

Weeks 5–6: Mixed short sets

Use short mixed problem sets (not only one topic per day). Aim for:

• 3–5 problems in a sitting
• Full written solutions for at least two of them
• A wrong-answer log: mistake type, fix, and one similar follow-up

Weeks 7–8: Timed blocks and review depth

Add light timing — for example 40–50 minutes — then a longer review.

Review should take at least as long as the attempt. The goal is not a score; it is a clearer next skill to practise.

One worked idea (the kind of thinking that transfers)

Problem. The sum of three consecutive positive integers is 48. What is the largest of the three?

Many students jump straight to guessing. A clearer path:

1. Represent: let the middle integer be (n). Then the three are (n-1), (n), (n+1).
2. Translate: ((n-1)+n+(n+1)=48).
3. Simplify: (3n=48), so (n=16).
4. Conclude: the largest is (17).
5. Check: (15+16+17=48).

That sequence — represent → translate → simplify → check — is the same habit used on much harder OSN-style problems.

What parents can do (without becoming the tutor)

• Protect quiet practice time; olympiad thinking needs uninterrupted blocks
• Praise process language (“I tried a second method”) more than speed
• Keep a simple folder of attempts and corrections
• Avoid stacking too many contests in the first term of serious prep

When a guided session helps

Self-study works until the student cannot see why a method failed. That is usually when a tutor is useful: to slow the problem down, expose the hidden structure, and rebuild the next attempt.

If you want structured OSN mathematics support, start with the program page and then choose a session that fits your week.

Next step: see OSN Mathematics or browse upcoming classes.