Integrating technology is not about technology – it is primarily about content and effective instructional practices. Technology involves the tools with which we deliver content and implement practices in better ways. Its focus must be on curriculum and learning. Integration is defined not by the amount or type of technology used, but by how and why it is used.
~Earle, R.S. (2002). The integration of instructional technology into public education. Educational Technology Magazine, 42(1), 5-13. Retrieved May 15, 2004 from http://bookstoread.com/etp/earle.pdf

Below are a few great web sites for curriculum integration across the curriculum at all grade levels. Each of these sites has an ocean of resources for you to explore. 
Suggestion: Useikeepbookmarks or diigo to keep up with your favorite sites. (Instructions on ikeepbookmarks are on the Help Sheets link.)
 

 
Internet4Classrooms: Links for K-12 Teachers

Teachers First: Curriculum Links

Cyberbee: Curriculum Ideas

Judy Reese's Educational Resources (sorted by grade level and curriculum)

42Explore Thematic Pathfinder

Poway Curriculum Sites

Mrs. Gold's Class Curriculum Sites for Kids

Pike County Curriculum Websites

Donna Murray Interactive Curriculum (click on link and scroll down on page to view)

alex: links/lessons Tech.Curric.

tech4kids Links 

ABC ya! --where education meets technology--divided by grade level

 For other intersting quotes about technology integration: Picture This: Effective Technology Integration in Schools/Faciliator: Jeni O'Sullivan Corn