A couple months ago, when I was trying to figure out Patreon, I ran across a couple of youtube channels that looked interesting. Now, I have not had time to check these out but thought that I’d mention them to you in case they included subjects in which your children are interested.
The first is probably just interesting to those in older grades as it deals with World War 1, I believe. It is called The Great War. From 2014 through 2018 he did a series about what happened that week a hundred years ago, which is interesting.
The other channel is about various points of history and even some videos about video games and gaming. The channel is called Extra Credits. There really is a wide assortment of videos here to check out. You could use either channel along with whatever other resources you are using for the specific historical time and talk about how the information corroborates or differs.
If you check these out, let me know what you think,