At that age I had started programming BASIC on my C64 a year earlier, copying the examples from a book targeted at adults and written in a language I did not kn

At that age I had started programming BASIC on my C64 a year earlier, copying the examples from a book targeted at adults and written in a language I did not know (english). [Only slightly bragging, but here is what i want to say:] The teaching material does not have to be all that pedagogical, but the motivation make the computer do something needs to be there. In this day and age, I think that the absolutely best environment is to make dynamic web pages. By just outputting a few rows of text you can see a result page and imagine having it online for friends to use. One can also create dynamic pictures. I used my knowledge of BASIC around that time to write training programs in multiplication, addition, and when English classes started, word translations. That is, I made semi-realistic solutions to problems I had, and the resulting program was used by me (and also friends once you could compete in score points).