2.http://www.aea267.k12.ia.us/framework/index.php?page=framework-intro-perf

3.http://www.aea267.k12.ia.us/framework/index.php?page=framework-intro-thin

For additional background, you may want to check out these two resources:

Understanding by Design, Expanded 2nd Edition, Grant Wiggins and Jay McTighe, Pearson/Merrill/Prentice Hall, 2007

1. http://www.amazon.com/Understanding-Design-Grant-Wiggins/dp/013093058X 
2. http://www.ubdexchange.org/

Making the Most of Understanding by Design, John L. Brown, ASCD, 2004 http://www.ascd.org/portal/site/ascd/menuitem.6a270a3015fcac8d0987af19e3108a0c/