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Two principles I've been teaching my 11 yo about programming: 1. Whenever you change a program, test it. 2. Adjust the size of your changes based on your confidence. Start with small changes. When those work, you can make bigger ones.
These two rules imply that you should begin any new program by solving the smallest subset of the problem you can test. (Famous example: The first version of GMail, which Paul Buchheit wrote in one day, was read-only and only worked for his email.)
Minimum viable product. Do the simplest thing that could work. Do the next simplest thing that adds value.
It’s even more basic than that. It’s minimum functional iteration. It doesn’t have to be viable or a product.
Always fix the first error first.
In what sens read-only? You couldn't compose emails?
Nope, first version just searched my own email, version two could search the user’s own email, and version three added “reply” function :)
1 of 2: The goal of testing is not just to prove that software does what it is supposed to do. It is also to demonstrate that the software doesn't do what it is not supposed to do.
2 of 2: Since this is impossible / impractical, only by writing test cases for even little changes can you have the confidence that the software doesn't do what it is not supposed to do - by validating everything that it is supposed to do.
I’m starting my 10 yo on his first solo-ish build for Spring Break. Did you start your kids off with a tutorial or have them start googling?
My two cents, writing tests first can be very powerful even without any kind of framework
Sounds you're teaching MVP(rogramming)...
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