Click on the following links. Please note these will open in a new window.

Songwriting
http://www.taxi.com/music-business-faq/songwriting/hooks/songconstruction.php

Taxi is a well-known service to match up composers with companies looking for music.
Read the article on their site describing four different types of “hooks.”
On your class forum, post a description of a popular song not mentioned in the article, explaining which of the four types it is, and where it appears in the song. How many times is it heard over the course of the entire song? Are any of the other three types of hooks present in the same song?

Everybody Can Write
http://www.songwritingscene.com

Songwriting Scene is a site with tips for budding writers like: how to start a song, chord progressions and tricks used by the pros, and songwriting exercises. It is easier than you think to write a song, but difficult to write a hit. Can you write a song? Analyze hit songs. What rules, chord progressions, hooks, and tricks did the songwriters use?

To get you started, use the Random Song Generator
http://www.songwritingscene.com/songgenerator/