What Is the Thinking Skills Section?
The Thinking Skills section is designed to assess a student's logical reasoning, critical thinking, and problem-solving ability — the cognitive skills that underpin academic success. Unlike subjects that test learned curriculum content, Thinking Skills measures raw intellectual potential: how well a student can analyse new information, identify patterns, draw logical conclusions, and solve unfamiliar problems.
This section appears in both the OC Placement Test (for entry into Year 5 Opportunity Classes) and the Selective High School Placement Test (for entry into Year 7 selective high schools). While the core skills assessed are similar, the complexity and question volume increase significantly from OC to Selective.
For Hills District families, the Thinking Skills section is often the deciding factor in competitive placements. With schools like Matthew Pearce PS, Baulkham Hills High School, and Cherrybrook PS receiving far more applicants than available spots, strong Thinking Skills performance can be the difference between an offer and a place on the reserve list. It is the section that most reliably separates high-performing students from the rest of the cohort.
Thinking Skills: OC Test vs Selective Test
While Thinking Skills appears in both tests, the format, difficulty, and expectations differ. Understanding these differences is essential for targeted preparation.
| OC Placement Test | Selective Placement Test | |
|---|---|---|
| Questions | 30 questions | 40 questions |
| Time | 40 minutes | 40 minutes |
| Time Per Question | ~80 seconds | ~60 seconds |
| Difficulty Level | Moderate — tests foundational logic and pattern recognition | Moderate to High — multi-step deduction and complex reasoning |
| Key Question Types | Patterns, analogies, simple deductions, Venn diagrams | Complex deductions, conditional logic, argument analysis, data sufficiency |
| Role in Overall Score | 1 of 3 sections (33%) | 1 of 4 sections (25%) |
The key takeaway: OC Thinking Skills focuses on foundational logic with more generous time per question, while Selective Thinking Skills demands faster, more sophisticated reasoning. Students who master the OC Thinking Skills section build a strong foundation for the harder Selective version two years later. In both tests, however, Thinking Skills is often the most differentiating section — the area where top-scoring candidates pull ahead.
Comprehensive Question Type Guide
The Thinking Skills section draws from seven core question families. Below is a complete breakdown of each type, how it appears in OC versus Selective, and strategies for mastering it.
1. Pattern Recognition
Pattern recognition questions present a sequence — visual, numerical, or alphanumeric — and ask the student to identify the next element or the missing element. These questions test the ability to detect underlying rules and relationships.
OC Test Appearance
Simple repeating patterns, basic shape sequences, straightforward number patterns (e.g., 2, 4, 8, 16, ?). Visual patterns with 1–2 changing attributes.
Selective Test Appearance
Multi-attribute patterns with rotation, scaling, and position changes simultaneously. Number patterns involving multiple operations or non-linear sequences (e.g., Fibonacci-like, alternating rules).
Strategy Tip
Teach your child to systematically identify what is changing (shape, size, colour, position, number) and what is staying the same. Draw arrows or annotate the pattern on scratch paper. Eliminate answer options one attribute at a time.
2. Logical Deduction
These questions present a set of conditions or constraints and ask the student to determine what must be true, what could be true, or what cannot be true. Common formats include scheduling puzzles, ordering problems, and relationship grids.
OC Test Appearance
Simple ordering (e.g., "A is taller than B, C is shorter than B — who is tallest?"). Basic relationship chains with 3–4 elements.
Selective Test Appearance
Complex multi-variable puzzles (e.g., scheduling 5 people across 3 days with 4 constraints). Requires systematic grid-based deduction and careful tracking of multiple conditions simultaneously.
Strategy Tip
Use a systematic approach: draw a grid or table on scratch paper. Start with the most restrictive condition first. Mark definite relationships with solid lines and uncertain ones with dotted lines. Re-read each answer option against all given conditions before selecting.
3. Analogical Reasoning
Analogical reasoning questions ask the student to identify the relationship between two items (A : B) and then find the same relationship applied to a third item (C : ?). These questions test the ability to recognise abstract relationships and apply them consistently.
OC Test Appearance
Concrete analogies (e.g., "puppy : dog :: kitten : ?"). Simple visual analogies with single-attribute changes. Word-based analogies at primary school vocabulary level.
Selective Test Appearance
Abstract conceptual analogies requiring multi-step reasoning. Visual analogies with multiple simultaneous transformations. Word analogies involving more sophisticated relationships (function, category, degree).
Strategy Tip
Articulate the relationship in plain words before looking at answer options. For example, "a puppy is a baby dog" — then apply: "a kitten is a baby cat." For visual analogies, identify each transformation separately (rotation, colour, size) before applying all changes to the third figure.
4. Venn Diagrams & Classification
These questions use Venn diagrams, set theory, or classification systems to test a student's ability to understand categories, overlapping groups, and logical relationships between sets of items.
OC Test Appearance
Simple two- or three-set Venn diagrams. Basic classification tasks (e.g., "which shape does not belong?"). Category membership questions with clear boundaries.
Selective Test Appearance
Complex multi-set diagrams with partially overlapping categories. Questions about "some," "all," "none," and "most" relationships. Data interpretation from Venn diagrams with given or calculable values.
Strategy Tip
Draw or redraw the Venn diagram on scratch paper. Label each region clearly. Work from the most specific to the most general information. When dealing with statements like "some A are B," remember this does not tell you anything about "some A are not B."
5. Conditional Logic
Conditional logic questions test the student's ability to reason with "if-then" statements, evaluate logical necessity, and determine whether conclusions are true, false, or uncertain given a set of premises.
OC Test Appearance
Simple conditionals (e.g., "if it rains, the ground is wet"). Basic true/false classification based on given rules. Single-step logical implications.
Selective Test Appearance
Multi-step conditional chains. Contrapositive reasoning (if A then B = if not B then not A). Determining necessity vs sufficiency. Complex "must be true" vs "could be true" distinctions.
Strategy Tip
Memorise the contrapositive rule: "If A then B" is logically equivalent to "If not B then not A." However, "If not A then not B" is NOT necessarily true. Practice translating conditional statements into simple symbols (A→B) to strip away confusing language and focus on the logic.
6. Spatial Reasoning
Spatial reasoning questions assess the ability to visualise and manipulate objects in space. This includes mental rotation, reflection, folding/unfolding nets, and understanding how shapes relate to one another in two and three dimensions.
OC Test Appearance
2D rotation and reflection. Simple shape matching from different perspectives. Identifying which shape does not match the others in a set.
Selective Test Appearance
3D rotation and perspective changes. Net-to-cube folding questions. More complex multi-step spatial transformations. These appear less frequently in Selective than in OC.
Strategy Tip
Practice with physical objects to build spatial intuition. For rotation questions, track a single distinctive feature (a notch, a colour, a pattern) through the transformation rather than trying to visualise the whole shape. Eliminate options that have the wrong relative positions.
7. Argument Analysis
Argument analysis questions present a short argument or claim and ask the student to identify assumptions, flaws, strengtheners, weakeners, or conclusions. These questions test critical reading and the ability to evaluate the logical structure of an argument.
OC Test Appearance
Rare or very simple in OC. Basic premise-conclusion identification. Simple "what is the main point?" style questions.
Selective Test Appearance
Common and challenging. Identifying hidden assumptions, recognising logical fallacies, determining what would strengthen or weaken an argument, drawing the most logical conclusion from given evidence.
Strategy Tip
Separate the conclusion from the evidence. Ask: "What must be true for this argument to work?" (the assumption). For strengthen/weaken questions, look for answer options that directly affect the link between evidence and conclusion. For flaw questions, common patterns include correlation vs causation, false dichotomy, and hasty generalisation.
Proven Strategies for Thinking Skills Success
These strategies have been refined over 15+ years of preparing Hills District students for the Thinking Skills section. They apply to both the OC and Selective tests.
Master Time Management Per Question
OC students have ~80 seconds per question; Selective students have ~60 seconds. If you are stuck after 45 seconds (OC) or 35 seconds (Selective), eliminate what you can, make your best guess, and move on. No single question is worth sacrificing three others.
Use Process of Elimination Ruthlessly
In multiple-choice Thinking Skills questions, wrong answers are often more obviously wrong than the right answer is obviously right. Cross off options that are clearly false, contradictory, or irrelevant. Even eliminating one or two options dramatically improves your odds.
Use Scratch Paper Systematically
Draw diagrams, grids, and notes on your scratch paper. The act of externalising your thinking reduces cognitive load and prevents mental errors. For deduction puzzles, a well-drawn grid is worth more than an extra minute of staring at the question.
Practice with Puzzles Outside Tutoring
Sudoku, logic grid puzzles, chess, Rubik's cubes, and strategy board games all build the same cognitive muscles that Thinking Skills tests. Encourage your child to engage with these activities for fun — the skills transfer directly to test performance.
Identify and Fix Your Weak Question Types
Most students have natural strengths and weaknesses across the seven question types. After each practice test, review which types you got wrong. Spend extra time on your weakest types. Hills District students often find conditional logic and argument analysis the most challenging — these deserve focused practice.
Common Mistake to Avoid: Many students overthink Thinking Skills questions. The test is designed to have one unambiguously correct answer. If you find yourself creating complex hypothetical scenarios to justify an answer, you are probably overcomplicating it. Look for the simplest logical path to the correct answer.
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Our program builds Thinking Skills mastery through structured practice and personalised feedback.
Get Thinking Skills PrepThinking Skills Preparation in the Hills District
The Hills District is one of Sydney's most competitive academic regions. With high concentrations of motivated families and top-performing schools — Matthew Pearce PS, Cherrybrook PS, Baulkham Hills High School — the standard for Thinking Skills performance is exceptionally high. Generic preparation is not enough. Hills District students need targeted, rigorous Thinking Skills training to stand out.
What Makes Hills District Competition Unique
- • Higher concentration of academically focused families
- • Multiple top-tier OC and selective schools within a small geographic area
- • Limited OC and selective places relative to applicant numbers
- • Thinking Skills scores often determine placement outcomes in this competitive environment
How to Build Thinking Skills at Home
- • Encourage daily puzzle-solving (Sudoku, logic grid puzzles, crosswords)
- • Play strategy games that require planning and deduction (chess, Settlers of Catan, Mastermind)
- • Read detective and mystery stories that involve logical reasoning
- • Discuss news articles critically — identify arguments, assumptions, and evidence
- • Use dedicated OC/Selective Thinking Skills workbooks for structured practice
For many Hills District families, at-home practice combined with expert tutoring delivers the best results. The Thinking Skills section rewards consistent, long-term development rather than short-term cramming — making early, structured preparation the most reliable path to success.
How Growth Academy Prepares Students for Thinking Skills Success
With 15+ years of specialised tutoring expertise, Growth Academy offers targeted Thinking Skills preparation for both OC and Selective tests. Our program is designed specifically for Hills District students who need to compete at the highest level.
- ✓ Thinking Skills-Specific Curriculum — Dedicated lessons covering all 7 question types with progressive difficulty from OC to Selective level
- ✓ Targeted Mock Tests — Thinking Skills-only practice tests with detailed performance analytics and question-type breakdowns
- ✓ Small Class Sizes — Maximum 8 students ensures individual attention and personalised strategy development
- ✓ Proven Hills District Track Record — Strong Thinking Skills results at Matthew Pearce PS, Cherrybrook PS, Baulkham Hills High, Fort Street, and Girraween
- ✓ OC and Selective Pathways — We prepare students for Thinking Skills at both levels, with a curriculum that builds from OC foundation to Selective mastery
Inspiring, Focused Campus Environments
Where modern facilities meet specialised, distraction-free Thinking Skills preparation.
Hear From Our Successful Students
Real results from real Hills District families who mastered Thinking Skills with our program.
Frequently Asked Questions About Thinking Skills for OC & Selective
How can my child improve their Thinking Skills score?
Consistent practice is the single most effective strategy. Thinking Skills is not something you can cram for — it requires building cognitive habits over time. We recommend weekly practice with a mix of puzzles, logic games, and structured worksheets, combined with regular mock tests to build speed and familiarity. Targeted tutoring helps by identifying specific weak question types and providing personalised strategies.
How does Thinking Skills differ between OC and Selective tests?
The OC test has 30 Thinking Skills questions in 40 minutes (~80 seconds per question), while the Selective test has 40 questions in the same time (~60 seconds per question). The Selective version also includes more complex question types like argument analysis and multi-step deduction that are not tested in OC. However, strong performance in OC Thinking Skills builds a solid foundation for the Selective test two years later.
What are the most common mistakes students make in Thinking Skills?
The most common mistakes are: (1) Overthinking — inventing complex rules that don't exist in pattern recognition questions; (2) Rushing — misreading the question and missing key constraints in deduction problems; (3) Getting stuck — spending too long on one question and running out of time for easier ones; (4) Not using scratch paper — trying to solve complex puzzles entirely in their head.
When should my child start Thinking Skills preparation?
For the OC test (Year 4), we recommend starting 6–12 months before the July test date. For the Selective test (Year 6), the same 6–12 month window before the May test date applies. Starting early allows for gradual, low-stress skill development. Many Hills District families start informal Thinking Skills activities (puzzles, logic games) even earlier, from Year 3 onwards, to build foundational cognitive skills.
Can Growth Academy help my child with just the Thinking Skills section?
Yes. While many students enrol for our full OC or Selective preparation programs, we also offer targeted Thinking Skills support for students who need additional focus on this section. Our Thinking Skills curriculum covers all seven question types at both OC and Selective difficulty levels, with dedicated mock tests and personalised feedback. Simply mention "Thinking Skills" in your enquiry and we will tailor the program accordingly.
How much does Thinking Skills affect the overall placement score?
In the OC test, Thinking Skills represents 1 of 3 equally weighted sections (approximately 33% of the total score). In the Selective test, it is 1 of 4 sections (25%). However, because Thinking Skills tends to produce the widest score variation among students — some find it very difficult while others excel — it often has a disproportionate impact on placement outcomes. Strong Thinking Skills performance can significantly lift a student's overall ranking, especially in competitive Hills District schools.
Ready to Master Thinking Skills for OC or Selective?
Fill out the form below and a member from our team will be in touch to discuss how Growth Academy can help your child excel in the Thinking Skills section. Include "Thinking Skills" in your message and let us know whether you are preparing for OC, Selective, or both.
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Your first Thinking Skills lesson is a paid trial at the standard per-session rate — no plan, no enrolment fee, no commitment. If it's not the right fit, simply let us know before the next session and you're done.
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