I keep thinking I’ve found a place to actually link to something from Khan Academy.
It’s purportedly “open,” after all, and … I haven’t made a video about multidigit addition. The video itself is actually reasonable — it includes discussion of place value and what the digits mean.
Sigh, however… it says right there: “Fourth grade.” Thanks, but no thanks.
Oh, and the video license? “Standard YouTube.” Not open.
Oh, and … if I go to it on YouTube? The comments are full of racist trollings.
It will be one of the “otherwise noted” in the “Except otherwise noted, this is OER,” and it will be the Math Antics video, thank you…