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.
Grand Canyon National Park Airport covers an area of 859 acres (348 ha) at an elevation of 6,609 feet (2,014 m) above mean sea level. It has one runway designated 3/21 with an asphalt surface measuring 8,999 by 150 feet (2,743 x 46 m).