JSO Guide · Years 7–10
How to Prepare for the JSO: An 8-Week Plan
Last updated 7 July 2026
What the Junior Science Olympiad tests beyond school science, where to find the free official past papers, and a week-by-week schedule that works.
Quick answer: The best JSO preparation is structured practice with the free official past papers from Australian Science Innovations (2020–2025, with answers), combined with targeted revision across biology, chemistry, physics and Earth science. Eight weeks of two to three focused sessions per week is enough for most Years 7–10 students to sit the exam with confidence.
The Junior Science Olympiad is a two-hour online exam that is deliberately harder than school science. Students who walk in cold are often rattled by the style of the questions, not the content. The good news: the style is learnable, and the official practice material is free.
What the JSO tests — and how it differs from school science
According to Australian Science Innovations (ASI), the JSO covers biology, chemistry, Earth and environmental science, and physics in a single two-hour online exam, sat at school under exam conditions. There are two levels: Years 7–8 and Years 9–10.
School science tests usually reward recall of recently taught content. The JSO is different in three ways:
- Breadth in one sitting. All four sciences appear in one paper, so a student strong in biology but weak in physics cannot hide.
- Reasoning over recall. Questions typically present unfamiliar scenarios, data tables or experimental setups and ask students to interpret, predict and conclude — skills schools teach, but rarely examine this intensively.
- Time pressure across multi-step problems. Two hours sounds generous until students meet questions that take three or four linked steps.
This is why past-paper practice matters more than re-reading the textbook.
Past exams: what's available
ASI publishes free past JSO papers with answers on its website, covering 2020 through 2025. From 2024 onward, separate papers are available for Years 7–8 and Years 9–10, each with an answer key. Earlier years (2020–2023) have a single paper plus answers. That is six years of official material — more than enough for a full preparation cycle without buying anything.
The 8-week plan
Designed for two to three sessions of 45–60 minutes per week. Adjust the start date so Week 8 lands on exam week (the 2026 exams were held 10 and 12 June; expect a similar mid-year window in 2027).
| Week | Focus |
|---|---|
| 1 | Diagnostic. Sit the oldest available past paper (2020) untimed. Don't worry about the score. Sort every question into: got it / guessed it / no idea. This map drives the next five weeks. |
| 2 | Physics and chemistry foundations. Revise the topics that appeared in the diagnostic: typically forces, energy, simple circuits, states of matter, chemical vs physical change, elements and compounds. Use your school textbook plus the relevant diagnostic questions, reworked from scratch. |
| 3 | Biology and Earth science foundations. Cells, body systems, classification, ecosystems and food webs; then rocks, weather, the water cycle, plate tectonics, and Earth in space. Again, rework the diagnostic questions in these areas. |
| 4 | Data and experiment skills. The JSO's signature skill. Practise reading unfamiliar graphs and tables, identifying variables (independent, dependent, controlled), spotting flaws in experimental design, and writing one-line conclusions supported by data. Any past-paper question with a graph or table is fair game for a second pass. |
| 5 | Timed half-papers. Sit half of the 2021 and 2022 papers under time (roughly one hour each). Goal: build pacing. Rule of thumb — if a question is going nowhere after two to three minutes, flag it and move on. |
| 6 | Full timed paper. Sit the 2023 paper in one two-hour block, online if possible, to mirror exam conditions. Mark it with the official answers, then spend a full session on corrections: every wrong answer gets a one-sentence note on why it went wrong. |
| 7 | Full timed paper, current level. Sit the 2024 or 2025 paper for your child's level (Years 7–8 or 9–10). Same routine: sit, mark, correct. Compare against Week 6 — most students see a clear jump. |
| 8 | Light review and logistics. No new material. Reread the corrections notebook, redo five previously wrong questions, confirm the exam day arrangements with school. Sleep beats cramming. |
Common mistakes parents and students make
- Starting with content revision instead of a past paper. Without a diagnostic, students revise what they already know. Always start with a paper.
- Ignoring the weakest science. All four sciences are in one paper. Thirty minutes a week on the weakest area outperforms three hours on the favourite.
- Practising untimed only. The exam is two hours under supervision. At least two full timed sits are essential.
- Skipping corrections. Marking a paper takes ten minutes; learning from it takes an hour. The hour is where the improvement lives.
- Treating it as pass/fail. Every student receives a certificate indicating their performance, according to ASI, and top performers are invited to the JSO Spring School. But for most students the real prize is the experience — frame it that way and anxiety drops.
A note on registration timing
ASI only accepts JSO registrations through schools (including distance education and registered home schools) — not from parents directly. If you are starting this plan, also start the conversation with your child's science coordinator in the same week, so registration is locked in before the school's internal deadline.
Prefer guided preparation?
Our Junior Science Olympiad program pairs structured lessons with mock exams, so students practise the JSO's reasoning and data-interpretation style week by week.
Explore the Junior Science Olympiad programFAQ
How long should my child prepare for the JSO?
Eight weeks of two to three focused sessions per week is a realistic target for most Years 7–10 students. Less time still helps — even two timed past papers beat no preparation.
Are JSO past papers free?
Yes. Australian Science Innovations publishes past papers with answers for 2020–2025 free on asi.edu.au.
Does my child need to know content beyond the school curriculum?
The exam draws on the same broad areas schools teach — biology, chemistry, physics and Earth science — but questions demand deeper reasoning and data interpretation than typical school tests. Practising the question style matters more than learning extra content.
What score does my child need?
ASI does not publish cut-offs. Every participant receives a certificate indicating performance, and top performers are invited to the invitation-only JSO Spring School.
My child is in Year 7 — is it too early?
No. The Years 7–8 paper is pitched for them, the 2026 fee was just $22, and early exposure builds exactly the skills the senior Australian Science Olympiad Exams reward later.
Sources
- Australian Science Innovations — Junior Science Olympiad program page: https://asi.edu.au/program/junior-science-olympiad/
- ASI — JSO past exams (free papers with answers, 2020–2025): https://asi.edu.au/program/junior-science-olympiad/junior-science-olympiad-past-exams/