Students throughout Boston are getting a radically different view of the world, one laminated 24-by-36-inch sheet of paper at a time.Beginning last Thursday, Boston Public Schools administrators have been sending social studies teachers in the second, seventh and 11th grades new maps for their classrooms — depictions that more accurately portray the sizes of Earth's continents.When many people picture a map of the world, what they're probably thinking of is a Mercator projection, a representation that despite its apparent distortions has been around more than 400 years. It's that map that hangs in most classrooms throughout the U.S., including those in Boston.By contrast, the map known as the Peters projection, which city authorities are now meting out to many of the city's classrooms, is a relative fledgling. Introduced at a conference in Germany in 1974, historian Arno Peters' map aims to fix the Mercator's inaccuracies, which vastly exaggerate the size of land masses approaching the north and south poles — and in doing so, help prop up a decidedly eurocentric worldview.Therein lies the rub."This is the start of a three-year effort to decolonize the curriculum in our public schools," said Colin Rose, assistant superintendent of opportunity and achievement gaps for Boston Public Schools, tells The Guardian."Eighty-six percent of our students are students of color," Hayden Frederick-Clarke, director of cultural proficiency for BPS, tells member station WBUR. "Maps that they are presented with generally classify the places that they're from as small and insignificant. It only seems right that we would present them with an accurate view of themselves."The issue rests partly in the problem of how to transpose the 3-D shape of Earth onto a two-dimensional sheet of paper. For Gerardus Mercator — the Flemish cartographer who in 1569 came up with the map still most commonly used today — the central goal was to support navigation along colonial trade routes. And the central point on the globe for him was, of course, Europe.The trouble is that his projection, which places northern Europe at the heart of the world and shrinks Africa and South America, is far from precise. The Guardian breaks down some of the most notable discrepancies: