For chapter 5 "World Cultural Heritage"
(Pre-Reading Material)
http://architecture.about.com/od/structural/ig/Leaning-Buildings/Tower-of-Pisa-.htm
This site is giving various information about the tower of Pisa.
Before reading about the leaning tower of Pisa in the textbook, it would be nice to give students chance to get to know about the tower and also see some pictures.
There could be some students don't know the tower then they might have hard time to understand the text. So try to introduce briefly about the tower and make students ready to read.
