History of the United States I / Unit 1 USH1 0006 short lesson, about 20 seconds
The Maya
Captions available
The idea
The Maya perfected the calendar and the writing the Olmec began, producing the only known written language of the pre-Columbian Western Hemisphere.
In practice
El Castillo at Chichen Itza, ninety-one steps a side, three hundred sixty-five stairs for the calendar year.
Where people slip
The great centres were abandoned by about nine hundred CE, attributed to poor soil and a nearly two-century drought.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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