สูตรหลักสิบล่าง7งวด
Certain childhood memories last a lifetime. Leafing through watershed moments in the pages of a history textbook is not one of them. No matter how scintillating the battle, how epochal the figure, how calamitous and significant the narrative, few students walk away from history class with a single vision permanently etched on the core of their minds.
from: http://ezinearticles.com/?3-Pivotal-Moments-on-Unforgettable-History-School-Trips&id=8018653
