I got these thoughts though:
1) Re-writing them to be more efficient would take some hours, which I don't have because my personal internet time is limited to the 10 minutes a night after Josie goes to sleep and before I pass out. I'd have to write a quiz scoring script from scratch, because all my quizzes are in php now, then I'd have to do the tutorial based off that... ugh.
2) People looking at this page are looking for tutorials, they obviously can't script worth a darn anyway otherwise they wouldn't need help figuring out how to add up form field values. They're probably not going to judge me.
3) Even if I do re-write the tutorials, someone else might still come along and judge me because there are still more efficient ways to do them. In fact I myself might even dwell on them, wanting to revisit them as I get improvement ideas.
4) Does the code work? Yes it does.
5) Just looking at it, I'm tempted to insert more "tips" for improving efficiency of the script that fit certain special cases, which I know would confuse the crap out of some newbie people.
So I'm just going to leave it all alone, I decided.
The tutorials are just out there, at least I'll say that. I mean, I don't promote them, or post them to communities. People post up some really stupid things in gimp_users sometimes, like "I can tell you how to make outline text in only 20 steps with the magic wand tool!" and I'm like, "What's wrong with text to selection > path > stroke?" because I'm snarky like that. When you put yourself out there, you run the risk of having people point out your inefficient techniques. I'm just gonna let the old tutorials do their thing in the background, that's my justification for leaving them out there as they are.