Computing for ages 10 to 16
Understand how computers think.
A computer is not a magic box. In Lus you see step by step what happens: programs that run while you watch, with blocks in your own language and real code next to them. From algorithms and binary numbers to the internet and staying safe online.
No ads, no tracking, no account needed. The learning path and the first three topics are free.
Task: draw the staircase.
repeat 3 times
- turn left
- turn right
- move 1 square forward
- move 1 square forward
Drag a block or use the arrows.
for i in range(3):
turn_left()
turn_right()
move()
move()The program draws 7 pixels, but no staircase yet. Move the blocks.
See it Try it: turn switches on and off and see which number you make
1 1 0 1 = 8 + 4 + 1 = 13
How a topic works
First look, then play, then understand.
Every topic has the same four blocks, always in this order. That way you know where you are.
Why
A question from your own life. How does your photo find its way to Spain? Why do you see different videos from your friend?
See it
A picture you play with: make a robot walk, switch bits on, mix colours, send packets. You see it happen.
Get it
The explanation in plain language, then the rule, and an example worked out step by step, with code where it fits.
Do it
Exercises that are checked straight away, with a hint and the solution. And a new exercise every time.
After that you read the typical pitfalls, where you come across it in real life, a bit of history, a question for the dinner table and what you need to know first or can learn next.
Four domains
From a loop to a padlock.
Algorithms
5 topics
Step-by-step plans, loops and conditions, variables, debugging, sorting and searching.
Data and binary
4 topics
Binary numbers, bits and bytes, pixels and colours, text as numbers.
Networks and the internet
3 topics
How the internet works, what happens when you open a website, feeds and recommendations.
Safe and smart online
4 topics
Strong passwords, spotting phishing, privacy and cookies, screen time in balance.
Who it is for
For those who learn, those who help and those who teach.
For pupils
Play robot, crack binary numbers and discover how your app chooses what you see. Mistakes are bugs, and bugs are there to be found.
Start practisingFor parents
You do not have to be a programmer. Every topic explains it calmly, with a question to talk about at the dinner table, about screen time and staying safe online too.
Choose a topicFor teachers
Show a picture on the board, let pupils practise at their own level and print a worksheet with the solutions included.
Make a worksheet
For schools
For schools and teachers.
Lus works in the classroom without any fuss: nothing to install, no pupil accounts, no external programming environment, pictures you play with together on the board and a worksheet that is ready in a minute.
Worksheets with solutions
Choose a topic, a level and the number of exercises. Print it out; the solutions are on a separate sheet, with the code too.
Free for teachers
Through Kaft, teachers use Lus for free, on the interactive whiteboard too.
No pupil accounts
Pupils practise without logging in. What they can do stays on their own device.
Programs you play together
The robot, the sorting bars and the packets move step by step, big enough to follow together on the board.
Lus and Kaft
A fair price, and a family of apps.
Lus is part of Kaft, the book cover with an app for every subject. No ads and no tracking, so you pay with money, not with your data.
What does Lus cost?
The learning path and the first 3 topics are free. For all of Lus, choose one of these plans:
- All of Lus€4 a month · €36 a year
- Kaft bundle, all apps€8 a month · €69 a year
There is also a family plan, a school plan and a free social rate.
You sign in and pay on Kaft. After that, every topic opens.
All prices on KaftThe Kaft family
Every app has its own subject and its own face, with the same way of working: understanding before cramming, calm and without ads.
Choose a topic and let it run.
Start with a step-by-step plan, binary numbers, the internet or whatever is coming up in class tomorrow.