The writing system of Korean language

Our class has many Korean students. So there are variety story about the history of Korean language, the difference of other language etc. I want to introduce the Korean writing.
In ancient times, the language of the Korea was written using Chinese character, using hanja. Knowledge of such systems was lost, and the Korean language was not written at all; the aristocracy used Classical Chinese for its writing.
Korean is now mainly written in Hangul, the Korean alphabet. Modern Korean is written with spaces between words, a feature not found in Chinese or Japanese. Korean punctuation marks are almost identical to Western marks. Traditionally, Korean was written in columns from top to bottom, right to left, but Korean is now usually written in rows from left to right, top to bottom.