Bill Cosmo and the plutonium pile
Future World Comics lasted two issues in 1946. It was an attempt to make entertainment out of real life science, and the world of possibilities imagined during and after the war. Atomic energy had been the stuff of science fiction until the reality of it was proven in 1945. The Bill Cosmo story from Future World Comics #1, drawn by comic book veteran Ben Thompson, is followed up by a short feature with Bill Cosmo on how atomic energy works. A couple of other stories in the issue use the same technique: "How the proximity fuze works" and "How radar works."
Several publishers, including Maxwell C. Gaines of All-American Comics and then EC Comics, had the idea that comic books could be educational. There were a lot of educational comics published over the years, mostly giveaway comics. Commercial success with educational material was a little tougher to achieve. Kids could sniff them out. I believe that given the choice of buying Action Comics or any other wholly fictional title, and an educational comic book, most kids would choose the former.