According to Vygotsky (1978), much important learning by the child occurs through social interaction with a skillful tutor. The tutor may model behaviors and/or provide verbal instructions for the child. Vygotsky refers to this as cooperative or collaborative dialogue.
Grand Junction, Colorado is 4,593 feet (1,397 meters) above sea level.
The elevation of the Colorado River, at the bottom of the Canyon, averages out to around 2,200 feet (670 meters). The average elevation of the south rim is around 6,800 feet (2,072 meters) with the highest spot, Grandview Point, being 7,400 feet (2,255 meters). The average elevation of the north rim is about 8,000 feet (2,438 meters) with the highest point, Point Imperial, being 8,800 feet (2,682 meters). The depth of the Canyon at the South Rim, near Grand Canyon Village, measures almost a vertical mile, about 5,000 feet (1,524 meters).