Please refer to this page:
http://w3schools.com/html/html_layout.asp
We often get people who are new at web developing on the forum, and often they are using tables to lay out their site. We keep on having to tell users that tables are not good. But the tutorials on the site of our own forum tell them how to use tables for layout, I believe these techniques shouldn't even be taught.
If a user is trying to defend their use of tables they'll be pointing to the W3schools tutorial and it may be harder to show reason to them.
