Material with no dates, software version numbers, etc., so that it's hard to tell whether information is obsolete or not.
Topics that are difficult to search for (D, Processing, ...).
Lack of mid-level information. (Say I want to learn to build websites. I can easily find, "HTML tags begin with '<'". I can also easily find, "Here's the bestest, coolest CSS grid." Quality tutorials at a level between these two are much rarer. Similarly, "to output in Python, use 'print'" vs. "Here's how to optimize your Django-based site." But in between ... ?)
Video tutorials for anything that doesn't involve physical action. (Give me a video to teach me how to ride a unicycle, but not how Newtonian mechanics works. How to type, yes, but not how to code.)
Comments
Material with no dates, software version numbers, etc., so that it's hard to tell whether information is obsolete or not.
Topics that are difficult to search for (D, Processing, ...).
Lack of mid-level information. (Say I want to learn to build websites. I can easily find, "HTML tags begin with '<'". I can also easily find, "Here's the bestest, coolest CSS grid." Quality tutorials at a level between these two are much rarer. Similarly, "to output in Python, use 'print'" vs. "Here's how to optimize your Django-based site." But in between ... ?)
Video tutorials for anything that doesn't involve physical action. (Give me a video to teach me how to ride a unicycle, but not how Newtonian mechanics works. How to type, yes, but not how to code.)
Video without subtitles/transcript.
Audio-only for anything at all. Ick.