Thank you Eriberto for your extensive feedback! (and I thought my package was reasonably good! :) )
Thank you Peter for your comment as well.
I was going to answer only after I had uploaded a new package.
> Hmm, this is an interesting point. The "education" section was added by
> the FTP Masters back in 2012, and grep-dctrl -FSection education seems
> to show me at least 128 binary packages matching that (e.g. gcompris,
> kanadic, scratch, etc). See the list of sections in Debian Policy 2.4;
> it seems that the webpage needs to be updated.
I also thought 'education' was a valid section: lintian doesn't complain,
Synaptic shows a "friendly" name translated to my language for that
section, vim doesn't mark it in red, and Ubuntu has some packages in
that section. And the Debian Policy mentions that section indeed.
Should I leave it in 'education', or should I change it? Maybe to 'java', or 'electronics' which is also a good choice. It's probably better to change.