If this link isn't working, simply do a search for "WASL" at the Amazon or Barnes and Noble sites. The student and parent editions of this series should be useful tools if you want to do some extra preparation at home.
Resources for WASL Preparation
Partnership for Learning
This site has lots of information about school reform, the WASL in particular, and lots more. You can find practice test items, summaries of CKJH performance, and comparisons to other schools.
OSPI Released Items
These are actual test questions from previous years. Of course, this year's test will have new items but you can get an excellent picture of the type of skills and thinking that are required to do well on the WASL.
Show What You Know - Books from Amazon.com
If this link isn't working, simply do a search for "WASL" at the Amazon or Barnes and Noble sites. The student and parent editions of this series should be useful tools if you want to do some extra preparation at home.