Once again, Darren you have me thinkin and tinkerin with perceptions and biases I have.
5 things that stand out...
feedback beyond the walls
engaged in teaching what they have learned..."
Awesome. I love this.
My two cents FWIW. I think that they look different and shouldn't mirror. For example the beauty of the feedback and collaboration online is that it is a flattened hierarchy where the loudest or squeaky wheel doesn't get to "dominate". However, online everyone has the same voice and power to speak. So, while I can pause, reflect, come back to this reply and either delete or send. F2F there is no "undo" or delete. It's more transparent (ironically.)
Publishing also should look different because when working online, a k-5 student could have the equivalent to a cutting room floor, just by layering permissions and access. you could post the story a 7 year old wrote on the school website, but if you have permissions set up, the only people who will see it are the "right" ones. Whereas, f2f if you put something in the hall, or front bulletin board, there is no freedom to fail or celebrate small steps. It either has to be polished and "best work" or you put the child in a vulnerable and unfair position.
Where I think the "teaching what you've learned" differentiates f2f or online is again in the ability to iterate before sharing and to access "expertise" in real time via the web. Short of helpouts on google, it's not that simple to pull in an expert synchronously and "just in time"
That's my two cents for whatever it is worth, and I thank you again my friend for sending me down this reflective journey on a Saturday ;)