Bebras Challenge Preparation: Computational Thinking

A computing competition with no computing required

The Bebras Computing Challenge is unusual and genuinely useful for one reason: no programming is involved at all. The challenge states this plainly. Tasks are short puzzles answerable without prior knowledge of computational thinking.

That makes it the right first competition for a Class 6 student who has never written a line of code, and it removes the obstacle that stops most schools running a computing contest — the assumption that students must learn a language first.

What the tasks actually test

Bebras tasks look like puzzles and are built on genuine computer science ideas.

A sorting task asks a student to order things under constraints, which is what a sorting algorithm does. A searching task asks them to find something efficiently, which is binary search without the name. An encoding task asks them to read information written in an unfamiliar representation. A graph task asks about routes and connections.

Students are doing computer science. They simply are not being told that, which is why they enjoy it.

The format

In the UK challenge, participants have 45 minutes for a set of interactive tasks, with the tasks graded across three difficulty levels so that every student finds something they can do and something that stretches them.

Age groups are set by the national organiser. The UK runs six — Kits at 6 to 8, Castors at 8 to 10, Juniors at 10 to 12, Intermediates at 12 to 14, Seniors at 14 to 16 and Elites at 16 to 19 — so a Class 6 to 8 student sits a paper written for their age rather than competing against students several years older.

For schools: it is free, and one teacher can run it

This matters more than anything else for a school deciding whether to take part.

The UK Bebras Challenge is entirely free to enter. A teacher signs up as the main school coordinator and can then enrol groups of students or the entire school. There is no budget approval to obtain, no per-student fee to collect, and no requirement that the supervising teacher knows how to program.

For a school wanting to start computing competitions, this is the lowest-friction option available anywhere. The 2026 UK window runs from 9 to 20 November; other countries run their own national challenges on their own dates.

What we teach

The course works the recurring task families rather than drilling past papers. Sorting and ordering, searching and decision trees, encoding and representation, graphs and paths, and logic and constraint puzzles.

Each is taught as a way of thinking rather than as a topic. A student who recognises that a problem is really about ordering under constraints knows what to try, even though the problem is dressed as beavers building dams.

Past tasks are worked by difficulty band, because the challenge is deliberately built in three levels and a student should know which band they are in rather than treating every task as equally urgent.

Why it is worth doing even if your child already codes

A student who has done some Scratch or Python sometimes dismisses Bebras as beneath them. That is usually a mistake.

Writing code and reasoning about computation are different skills, and the second is the one that transfers. A student who can follow a tutorial but cannot work out why an approach is inefficient has learned syntax rather than computer science. Bebras tests exactly the part that was skipped.

Where it leads

Bebras is a doorway rather than a destination. Students who enjoy it move naturally to the Beaver Computing Challenge, which is close in style and run by the University of Waterloo, and then to ACSL, where programming enters.

From there the route runs towards national computing olympiads such as INOI in India and USACO internationally. Very little at this stage is competition-specific: what a student builds is the reasoning that makes every later programming course easier.

How the classes run

Live online group classes, a maximum of eight students. Students work tasks during the session and explain their reasoning aloud, which is how a child discovers that there was a method rather than a lucky guess.

Age groups, dates, task counts and registration arrangements are set by each national Bebras organiser and change between years. Confirm the current cycle with your national organiser before planning around it.