I know "Eastward Ho" has been shown in history text
books. I imagine "Home Again" has been used, too.
One way history teachers can use paintings like these
is to project them on a large screen or white sheet -
then have students act them out - telling what is
happening, taking on the mood/emotions of the people
in the paintings. These paintings tell us a lot about
Victorian costume as well.
Here are more paintings by Henry Nelson O'Neil
(reproductions)