ISO Class 10

The SOF International Science Olympiad (ISO) for Class 10. The science olympiad rewards understanding over recall. A child who has memorised a definition and one who can predict what happens when a variable changes look identical in a school test and very different here.

By this stage the syllabus overlaps heavily with board preparation, so the marginal cost of olympiad practice is low and the marginal benefit — reasoning under time pressure — transfers directly to boards.

The paper

50 questions in one hour, for 60 marks.

Section	Questions	Marks each	Total
Logical Reasoning	10	1	10
Science	35	1	35
Achievers Section	5	3	15
Total	50		60

The Achievers Section is 5 questions at 3 marks each — 15 of the 60 marks from a tenth of the questions. It is where the paper is actually decided, and it is the part most preparation skips.

What is on the syllabus

Logical Reasoning

Verbal and Non-Verbal Reasoning.

Science

Chemical Reactions and Equations, Acids, Bases and Salts, Metals and Non‑metals, Carbon and Its Compounds, Life Processes, Control and Coordination, Reproduction in Organisms, Heredity, Light-Reflection and Refraction, The Human Eye and the Colourful World, Electricity, Magnetic Effects of Electric Current, Our Environment.

The Achievers Section draws on the same syllabus, at higher order.

How Sophoz prepares for it

Practice is weighted towards problems whose shape is unfamiliar, because that is the skill the paper tests. Hints open up an approach rather than giving away the step, so the child still does the noticing.

Sessions are paced backwards from the exam date, with earlier topics revisited at widening intervals. Spacing beats massing by a wide margin — it is the best-evidenced result in learning science.

Mastery is tracked per skill rather than per subject, so a weak area is visible instead of being averaged away inside a percentage.

Before you register

Registration is through the school; SOF does not generally accept individual entries. Classes 3 and above have a second level for top performers, so a strong first paper is not the end of the preparation.

Syllabus and paper pattern from the Science Olympiad Foundation. Check sofworld.org for the current year's dates before planning around them.