Even at these middle grade levels, it is important to revisit previous mathematical ideas to deepen understanding. All of our 7th grade teachers participated in an integrated unit on the Maya. I ...
An international team of researchers has solved one of the great enigmas of the ancient world: how the Maya managed to make such astonishingly accurate predictions of solar eclipses. By reexamining ...
With the Aid of a Remarkable Mathematical System These Early Americans Determined the Equinoxes and Closely Predicted Eclipses of the Sun and Moon ...
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