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NCSS Challenge

The NCSS Challenge is a friendly 5-week competition where students learn to code as they go along.

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Verified teachers get free access to all our school courses, competitions and playgrounds including solutions and teacher notes.

Learning to code has never been so accessible!

Challenging problems

Our problem-based learning approach matches each new concept with a problem so you learn by doing!

Code in the browser

Code from any device, any time - start a question on your iPad at school and finish it off on your computer at home.

Interactive notes

Dive straight into coding while using the notes, with interactive code snippets that can be edited and run.

Intelligent automarking

Our automarker breaks each problem down into tests and gives you useful feedback to help you solve it!

Have fun while you learn!

Get those green diamonds, earn points for every problem you solve, and collect all of the hidden achievement badges! Do you have what it takes to be a Grokstar?

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Start your coding journey with our...

Free short activites

Take your first steps with our free short activities, designed to start you on your programming journey!

Start coding

Then take your skills to the next level with a course or competition!


Our courses are comprehensive resources that will teach you how to code in Blockly, Python and HTML/CSS. Learn comfortably at your own pace while solving fun problems!

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Strive to earn points while you compete with other students from around the world! Personalised, one-on-one tutor support is available during competition times.

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Moreton Bay Boys' College
Eaton Bank Academy
Waimea College
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