How can I use Project Based Learning in my classroom?

Just what is a rubric?
http://www.middleweb.com/CSLB2rubric.html

The Basics: What is a 'Rubric'? -
http://www.rubrics.com/concepts/index.html
Rubrics are a critical and vital link between assessment and instruction. This site provides an overview of rubrics and their role in teaching and learning.

More Articles about Project Based Learning:
Summaries of resources that connect to project-based, collaborative learning.

http://www.2learn.ca/Projects/Together/KWORDS/projecta.html
http://www.bie.org/pbl/overview/whatis.html
http://www.ed.gov/pubs/SER/Technology/ch8.html
http://www.4teachers.org/projectbased
http://pblmm.k12.ca.us

How to find an Online science project:

Search engines
Lycos (http://www.lycos.com)
Google (http://www.google.com)
BigChalk (http://www.bigchalk.com)
Blue Web'n (http://www.kn.pacbell.com/wired/bluewebn)

The Project Center Science Projects
http://www.eduplace.com/projects/scproj.html
Good places to get ideas for great science projects.

The Project Center
http://www.eduplace.com/projects/index.html