A majority of schools in Chile are back in session nine days after a massive earthquake rocked the region.Chile's education minister says about eighty-percent of the country's students are back in school.The remaining students are on stand-by because their schools were too badly damaged by the eight-point-eight magnitude quake.Crews are analyzing the damage in buildings across the region to see if people can safely return.The quake registered as one of the strongest earthquakes in recorded history.