Common Entrance Science: A Complete Guide for 13+

Science sits alongside English and Maths as a core subject at 13+ Common Entrance, and it is the one where a child's marks most often reflect how well they can apply what they know rather than how much they can recall. The papers reward genuine understanding, careful reading of the question, and the ability to explain and to work through unfamiliar problems. This guide sets out what Common Entrance Science covers, how the papers are structured, and how to prepare your child so that the subject feels like reasoning rather than memorising.

What the papers cover

The 13+ Common Entrance Science examination is set by the Independent Schools Examinations Board and draws on the three sciences your child will have been studying: biology, chemistry and physics. The content spans the familiar territory of a good prep-school science education, from cells, the human body and ecosystems, through materials, reactions and the particle model, to forces, energy, electricity and the physics of everyday phenomena. What matters as much as the content is the way it is tested. Questions rarely ask for a bare fact in isolation; they set that knowledge in a context and ask a child to use it. Our broader guide to 13+ Common Entrance explains how science fits alongside the other subjects in the examination.

How the papers are structured

Science at 13+ is most often examined as three separate papers, one for each of biology, chemistry and physics, and schools may set them at more than one level so that children are assessed appropriately for their stage. Each paper mixes shorter questions that check core knowledge with longer, structured questions that build across several parts, often around a scenario, a set of data or a short experiment. Because the marks are spread across all three sciences, an even preparation matters: a child who is strong in biology but shaky in physics can lose ground that their overall ability would not predict. Knowing which level and which papers your child's target schools require is a sensible early step, since it shapes how you plan the revision.

Understanding over memorising

The children who do best in Common Entrance Science are usually those who understand the ideas rather than those who have memorised the most facts. A child who genuinely grasps why a circuit behaves as it does, or how a reaction rearranges particles, can handle an unfamiliar version of the question, whereas one who has learned a fixed answer is stranded the moment the wording changes. The practical way to build this is to have your child explain concepts aloud, in their own words, as if teaching them to someone else. When a child can explain why, not just state what, they are ready for the applied questions that carry the higher marks. This habit also makes revision far more durable, because understanding sticks in a way that rote learning does not.

Practical and enquiry skills

Science papers also reward the skills of enquiry, and these are easy to overlook in revision because they are not a topic in the usual sense. Children are asked to read data from tables and graphs, to spot patterns, to suggest why a result turned out as it did, and to identify how an experiment could be made fairer or more reliable. These questions often carry generous marks and can be prepared for directly, by practising the reading of graphs and the language of variables, fair testing and reliability. A child who is comfortable talking about what was measured, what was kept the same and what the results show has a real advantage, because these enquiry questions appear across all three sciences and reward a transferable way of thinking rather than a single fact.

How to prepare

Effective preparation for science is even and steady across the three subjects, with extra time given to whichever science your child finds hardest rather than the one they enjoy most. Work through past and sample papers under timed conditions, and go through the answers together afterwards, paying particular attention to the structured questions and the enquiry skills, since these are where understanding is tested most directly. Encourage the explain-it-aloud habit as part of everyday revision, and use diagrams and simple demonstrations where they help an idea to land. Keep the sessions short and regular rather than long and occasional, because science understanding builds through repeated contact. Our Common Entrance revision checklist shows how to fit science into a balanced plan across all the subjects.

Common pitfalls

The most common pitfall in science is revising by rereading notes, which feels productive but builds little, when active recall and practice questions build far more. The second is neglecting the weakest of the three sciences until it drags the overall mark down. The third is skipping the enquiry and data questions in revision because they are harder to drill than facts, even though they carry real marks. The fourth is rushing the reading of a question and answering what a child expected to be asked rather than what was actually asked, a habit that costs marks a child can easily earn. Steady, even practice, an emphasis on understanding, and time spent on data and structured questions together address all four.