This was the inaugural coin in the "Native American" dollar series, which began in 2009. The series celebrates notable accomplishments by native Americans. This particular coin is called "Three Sisters" and honors a planting technique involving squash, beans, and corn (the 3 sisters) From the U.S. mint's site: "...In this planting relationship, the corn stalks support the bean vines. The beans add nitrogen to the soil, which feeds the corn. Squash vines grow along the ground, with large leaves that shade the ground, keeping it from drying out and discouraging the growth of weeds, which would steal nutrients from all the plants. These plants don’t compete for nutrients and space. In fact, the corn, beans, and squash can actually produce more fruit when grown together than they can separately. That’s what makes them such good companions!" You can read more here: https://www.usmint.gov/learn/kids/l...n-dollar-coins/2009-three-sisters-agriculture
Another one in the series with a cool story is Sequoyah. Before its release, I've always assumed that all languages have both spoken and written forms. Well, turns out that the Cherokee tribe never had a written form of communication until Sequoyah developed it (after he saw that Westerners were able to write down words)! As expected, there were resistance and skepticism at first so his only student was his own daughter. One day (according to the story), he had the Chief say something to his daughter while he was out of earshot. His daughter wrote it down and then he returned to read aloud what the Chief had said. That impressed the elders in the tribe.
