If Americans know anything at all about history (or grammar, or math) then credit TV.
Every Saturday morning — interspersed among our animated favorites — ABC would run three minute Schoolhouse Rock cartoons which have to be the most successful educational experiment in American history. (They definitely had it all over the public schools!)
When I was in high school, we had to write the preamble to the Constitution on a history exam. Before we could even put pen to paper the teacher shouted, “and you can’t sing it!!” (Most people will get that reference.)
Here’s an old fav that made an entire generation of Americans hate those tyrannical old Brits!