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.
Spending a night or two at the altitude of Denver or Boulder, about 5,000 to 6,000 feet above sea level, will help you acclimate without any effects of altitude sickness. From there, you can rise to 8,000 feet and then to 10,000 or 11,000 feet.