A type of farming that consists of different "steps" or terraces that were developed in various places around the world.
A knot-record that was a method used by the Incas and other ancient Andean cultures to keep records and communicate information.
A type of Mesoamerican agriculture which used small, rectangular areas of fertile arable land to grow crops on the shallow lake beds in the Valley of Mexico.
Piedra del Sol, Aztec Calendar
Mr. Christopher Patten