The Line That Grows
Your first variable, and why it turns a circle into a spiral
About 35 minutesMediumTurtle and Code
What your child can do at the end
Create a variable with a set block and change it inside a loop
The brief
A repeat block does the same thing every time. But what if the forward step got a little bigger on every pass? Then the line would curl outwards instead of closing up. To do that you need a box with a number in it that you are allowed to change. That box is called a variable.
Skills it develops
variablesloops
How it is assessed
3 graded challenges inside the lab, and 7 questions at the end that check the idea rather than the clicks. Every attempt is saved, so a retry after a mistake counts as the learning it is.