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.
1 Compare this to the elevation of the lowest point at Phantom Ranch on the bottom of the canyon floorâwhich is 2,400 feet high. 2  The Grand Canyon averages 10 miles across in width. 3  Its narrowest point is in Marble Canyon, where it is 600 feet wide. 4  Its maximum width of 18 miles is found at several different points.