Should Flat-Earth Theory be taught in schools as an alternative to Sphere-Earth dogma?
No, because it is not mainstream science. In fact, very few scientists support today this theory. It was not always so in the past. But we could tell in schools that many people in the past thought that the earth was flat. Further information about the flat earth theory here: http://en.wikipedia.org/wiki/Flat_earth Another alternative theory, which should also not be taught in schools as a real alternative, but just as some very controversial (if not crazy) idea, is that of the hollow earth. “Instead of saying that humans live on the outside surface of a hollow planet, sometimes called a “convex” hollow-Earth theory, some have claimed that our universe itself lies in the interior of a hollow world, calling this a “concave” hollow-Earth theory. The surface of the Earth, according to such a view, might resemble the interior shell of a Dyson sphere.