The zone of proximal development, often abbreviated as ZPD, is the difference between what a learner can do without help and what he or she cannot do. It is a concept introduced, yet not fully developed, by Soviet psychologist Lev Vygotsky (1896â1934) during the last ten years of his life.
Report Abuse. 1  Baguio City Elevation. 2  The city is at an altitude of approximately 1500 meters (5100 ft) in a moist tropical pine forest conducive to the growth of mossy plants and orchids. 3  It is over 5,00Today: Cloudy with showers.  try yahoo weather.
Highest mountain face underwater. Share. With an altitude of 7,711 feet (2,351 m) above sea surface and 20,000 feet (6,098 m) below sea surface to the sea floor, Monte Pico in the Azores Islands (Portugal) is the highest underwater mountain in the world.