Hello, any ESL teachers here?

Got a couple of questions to ask about regarding to English grammar.

How do you teache 'passive voice'?

Example:
Active: My mom calls me "Honey!" (I have no idea why the hell this is an example...)
Passive: The jungle is also called the 'rain forest'.
The office is cleaned everyday.

I understood the meaning of 'passive voice', but can anyone give suggestions of how to teach them in an ESL class?

Many thanks.

Crap~I posted with Pape's name...

Opps, sorry!

you probalready Googled, but just in case:

http://www.johnsesl.com/templates/writing/passive.php

BTW, check your PM box.