No experience required. Learn to code with students from around the world!
HTML5 & CSS3
Beginners | Intermediate
Python 3 & Blockly
Learn to code as you compete!
Python 3 & Blockly
Go on a coding adventure.
CS Education Week
Open to everyoneMore details
Do an introductory hour of code!
Our problem-based learning approach matches each new concept with a problem so you learn by doing!
Code from any device, any time - start a question on your iPad at school and finish it off on your computer at home.
Dive straight into coding while using the notes, with interactive code snippets that can be edited and run.
Our automarker breaks each problem down into tests and gives you useful feedback to help you solve it!
Find a welcoming community of students, teachers and tutors on the forums. Find help from qualified tutors, and chat in a safe, moderated environment.
Grok competitions are challenging, and we want to recognise students’ achievements! All students who participate will receive a printable certificate.
Go head to head with students from around the world! Earn points for each problem you solve, and rank on the leaderboard. to win glory for yourself and your school!
“It teaches you as you go so you are able to test yourself, but you aren't expected to already know everything. I love how the problems are so creative, and entertaining to read. The tutors are also really friendly and respond quickly to queries.”
“Working on a challenge for hours, racking your brain and thinking about it for hours more, and then the feeling of success and satisfaction when you run it and it's correct! I love the little adrenaline rush you get when all the green ticks pop up!”
“Students who have normally been less than engaged in Tech are suddenly immersed in it, not only managing to work through the problems and frustrations but also helping each other. The collegiality and collaborative environment is fabulous.”
Sujatha, Technology Teacher
“Not only did the challenges allow [students] to develop new skills, it also improved their self confidence as they were able to see the improvements they made as they worked through the problems. Our school based data shows improved computational thinking with improved results in external competitions.”
Linda, Technology Teacher