For the first AO of the Visual Effects unit you must understand and analyse the use of 3 different effects types. The FIRST one will be GREEN SCREEN.
Write on your blog a response to the following:
1) Find a definition and briefly explain what green screening is.
2) Plot out a brief history of green screening describing the key points in its development and use in film and TV.
3) Find a use of it in a film and analyse why it was used, how it was used and critique the final piece (is it convincing etc).
To help you research - use Wikipedia - it's a great start but follow up you research by looking at the references at the bottom of the document.
Watch this documentary - the man is annoying but it is useful:
Then search on Youtube or for articles about use of green screen in certain films. Look for obvious big budget special effects films but if you look for its use in TV dramas like Ugly Betty you'll be surprised just how much it is used.