communication
Explaining technical material to people learning it
Taking a concept someone is stuck on, working out which part they are actually stuck on, and explaining it in terms they already hold rather than in the terms the textbook used.
Distinct from writing documentation: the audience is present, confused in a specific way, and the explanation has to adapt in real time. Teaching a subject also exposes how well it is genuinely understood, since a shaky understanding survives writing code but not questions.
Evidence3
Teaching Assistant, Computer Graphics
The workshops are where students are stuck in front of the problem rather than reading about it, so the work is diagnosing which part of the pipeline someone has misunderstood and explaining it in terms they already hold.
IELTS Academic
An independent measure of written and spoken English at C2, which is the language most of this work is documented and discussed in.
Certhub: a six-person team build with a real client
I explained progress and constraints to a client who was not technical. The part that actually mattered was describing a trade-off well enough that they could make the decision themselves.