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Q: How do I prepare for the SPSO practical round (Round 2)? A: The SPSO practical round tests hands-on science skills — observation, measurement, data recording, and inference — using apparatus and materials from the primary/lower-secondary science syllabus. Students who cleared the Round 1 written paper are invited. Preparation centres on practising basic lab techniques, recording observations clearly, and understanding simple instruments.
TL;DR Round 2 is a practical session for top performers from the SPSO Round 1 written paper. Past participants have reported activities involving pH testing, measuring physical properties, simple chemical reactions, and biological observations. The best preparation is systematic practice with basic lab apparatus and clear, organised data recording. Details change year to year — always check the latest official SPSO pages before preparing.
Link this guide back to the main SPSO overview for Round 1 written-paper advice and award structure.
Status: NUS High SPSO official pages checked 2026-03-23 — two-round structure (written → practical for top scorers) unchanged. Specific activities, apparatus, and logistics can differ each year; verify the current circular before preparing.
1 What is the SPSO practical round?
The Singapore Primary Science Olympiad (SPSO) is organised by NUS High School of Mathematics and Science. Only students who score well enough on the Round 1 written paper (a 40-question MCQ exam) are invited to Round 2 — the practical session.
Round 2 is not a separate competition you sign up for. If your child qualifies based on their Round 1 performance, the school will receive an invitation with logistics (date, venue, what to bring). The threshold for invitation is set each year by the organisers and is not published in advance.
Because Round 2 is reserved for students who have already demonstrated strong theoretical knowledge, the practical session assumes comfort with primary-level and some lower-secondary-level science concepts.
2 What skills are tested?
Based on accounts from past participants and the general aims of science olympiad practical rounds, Round 2 typically assesses:
Noticing colour changes, states of matter, biological features, or physical phenomena and describing them precisely
Measurement
Using simple instruments (ruler, thermometer, pH paper, stopwatch, measuring cylinder) with appropriate precision
Data recording
Writing results in tables with correct units, headings, and consistent format
Inference and reasoning
Drawing conclusions from observed data — e.g. identifying an unknown substance, explaining a pattern
Lab safety awareness
Handling apparatus carefully, following instructions, and demonstrating safe working practices
The practical is not purely about "getting the right answer." Clear, systematic recording and sensible reasoning are valued as much as the final result.
3 Types of activities historically reported
The following types of activities have been described by past SPSO participants in forum discussions and parent accounts. These are not guaranteed to appear in any given year — the organisers set the tasks independently each cycle.
3.1 Chemistry-related activities
Checking the pH of solutions using indicator paper or universal indicator
Observing and recording simple chemical reactions (e.g. mixing substances and noting gas production, colour change, or precipitate formation)
Identifying unknown substances based on observable properties
3.2 Physics-related activities
Measuring physical quantities such as length, mass, temperature, or time
Observing how variables affect a simple system (e.g. how the angle of a ramp affects how far an object rolls)
Using a stopwatch or ruler to collect data and recording results in a table
3.3 Biology-related activities
Making and recording biological observations — examining specimens, noting features, or classifying organisms
Using a hand lens or basic magnification tool to observe detail
Recording observations with labelled diagrams
Past participants have noted that the tasks tend to test lower-secondary science and some concepts at or near O-level difficulty, but the emphasis is on practical execution rather than advanced theory.
4 How to prepare
4.1 Build familiarity with basic lab apparatus
Your child does not need access to a full chemistry lab. Many of the relevant skills can be practised with everyday items or simple kits:
Thermometer: practise reading to the nearest 0.5 °C and recording with correct units
Ruler / measuring tape: measure lengths and record in consistent units (mm or cm)
Stopwatch: time repeated events and calculate an average — practise starting and stopping at the right moment
pH paper / universal indicator: if available, test household liquids (lemon juice, baking soda solution, tap water) and record the pH alongside observed colour changes
Measuring cylinder: practise reading the meniscus at eye level
This is the single most impactful preparation step. Many students lose marks not because they cannot do the activity, but because their recording is messy or incomplete.
Always use a table with column headings, units, and neat entries
Record what you actually observe, not what you think should happen
When drawing biological specimens, use a sharp pencil, label clearly, and include a title and magnification if relevant
Write in full sentences for inferences — e.g. "The solution turned pink when universal indicator was added, which suggests a pH of approximately 8 (weakly alkaline)" rather than just "pink"
4.3 Review secondary school science textbook lab chapters
The practical content draws from primary-level and lower-secondary science. Helpful revision topics include:
Properties of materials (hardness, solubility, conductivity)
Acids and bases — what pH means, how indicators work
Forces and motion — simple measurements of distance and time
Living things — classification, external features, habitats
The scientific method — variables (independent, dependent, controlled), fair testing
4.4 Do timed practice runs
Under exam conditions, time pressure matters. Set up a simple task at home (e.g. "measure the temperature of three cups of water at different starting temperatures every 2 minutes for 10 minutes and record in a table") and impose a time limit. This builds the habit of working efficiently and recording as you go.
5 Common mistakes to avoid
Rushing through instructions. Read the entire task sheet before touching any apparatus. Misunderstanding what to record wastes time.
Not labelling tables properly. Every column needs a heading and a unit. "Temperature" alone is incomplete — use "Temperature / °C".
Recording expected results instead of actual observations. If the indicator stays yellow when you expected it to turn green, record yellow. Honest recording is rewarded.
Ignoring significant figures and precision. If a ruler measures to the nearest mm, do not record "5 cm" when you mean "50 mm" or "5.0 cm."
Messy diagrams. Biological diagrams should be drawn with clear, continuous lines (not shading), labelled with straight ruled lines, and given a title.
Forgetting safety basics. Even in a supervised setting, handle glassware carefully, do not taste or smell substances directly, and follow instructions about disposal.
6 Linking to the bigger picture
The SPSO practical round builds the same core skills that students will use throughout their science education — from IP weighted assessments to A-Level Paper 3/4 practicals. Starting early with tidy data recording and careful measurement pays dividends for years.
7.1 How do I know if my child qualifies for Round 2?
Round 2 invitations go to students who perform well on the Round 1 written paper. The qualifying threshold is set by the organisers each year and is not published in advance. Your child's school will notify you if they are invited.
7.2 What should my child bring to the practical session?
The invitation letter from NUS High will specify what to bring. Historically, students have been advised to bring stationery (pencils, ruler, eraser) and wear appropriate attire. Apparatus and materials are provided at the venue. Always follow the specific instructions in your invitation.
7.3 Can my child practise with past SPSO practical papers?
Past SPSO practical papers are generally not publicly released. The best preparation is to build general lab skills — measurement, observation, and recording — rather than trying to predict specific tasks.
7.4 Is the practical round individual or group-based?
Based on past participant accounts, the practical session is typically completed individually. However, format details can change year to year. The invitation letter will clarify the setup for your cohort.
7.5 Does the practical round count towards the final SPSO award?
Yes — Round 2 performance contributes to the overall assessment for final awards. The exact weighting between Round 1 and Round 2 is determined by the organisers each year. Check the official SPSO FAQ page for any published details: https://www.nushigh.edu.sg/spso/faq/
7.6 My child has no lab experience at all. Is that a problem?
Many Primary 5 students have limited formal lab exposure — this is normal. The activities are designed to be accessible with careful reading of instructions. Practising basic measurement and observation skills at home (as described in Section 4) is sufficient preparation for most students.
