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.
How many feet above sea level is the city of Denver? Denver's official elevation is exactly one mile. 5,280 feet [1,609m]. That's why it's called the Mile High city.