Here you will find some of the links and resources I have found helpful for language arts, mainly reading.
Reading Key (this is a membership site, but does offer a free trial for the first 9 weeks. My students enjoy doing the weekly vocabulary sheets.)
Reading A-Z (nice resource for guided reading lessons, fluency. Many things for k-2, but does go to higher leveled stories for third and fourth)
MIKIDS.com (great for 6+1 traits of writing many lesson plans dealing with the traits. Good for k-5)
Instant Poetry Forms- huge collection of poetry forms. Students can see examples then fill in the blanks to create their own poems.
ReadWriteThink - This site has hundreds of reading/language arts lesson plans k-12.
SpellingCity.com This free site offers multiple games for students. Teachers can upload the weekly spelling lists for students to practice and play games with.
Educational Study Tools - mind maps and graphic organizers