I chose 2 sites because teacherhub provides a great teacher service for connecting with other educators, not to mention a great list of why we need to integrate the arts. Teacherhub is a great tool for teachers to collaborate and share their ideas! I also listed educationcloset because they had some awesome premade lesson plans. I think a lot of us forget that integrating the arts does not always mean we have to "reinvent the wheel" there are resources out there for when our creative juices aren't flowing or when we just don't have the time. The lesson plans on this site are very well laid out and clearly integrate the arts in a meaningful context.
Teachertube - Why to integrate the arts
EducationCloset - Lesson Plans :)