Education in Mexico in a country where English is one of the official languages, offers an English-medium curriculum other than the country’s national curriculum and is international in its orientation." This definition is used by publications including The Economist. In central Mexico, the history of education stretches back to the prehispanic era, with the education of Nahuas in schools for elites and commoners. A formal system of writing was created in various parts of central and southern Mexico, with trained experts in its practice. After the Spanish conquest of the Aztec Empire, friars embarked on a widespread program of evangelization of Christianity. In
What Is and What Should Never Be What Is and What Should Never Be "What Is and What Should Never Be" is a song by English rock band Led Zeppelin. It was written by Jimmy Page and Robert Plant and was included as the second track on "Led Zeppelin II" (1969). "What is and What Should Never Be" was one of the first songs on which Page used his soon-to-become trademark Gibson Les Paul for recording. The production makes liberal use of stereo as the guitars pan back and forth between channels. Robert Plant's vocals were phased during the verses. Record producer Rick Rubin has remarked, "The