Readworks - this site breaks down all the common core elements into grade specific lesson plans, plus worksheets, plus online reading passages and questions. Great resource, covers ELA standards K - grade.
Required nightly reading is a big part of most homework in elementary school so mix it up! Get your students out of a stale reading routine and get them reading in a variety of places and situations (ex. reading on a Wednesday under a tree)
LOVE, LOVE, LOVE Interactive Student Notebooks - A unique resource that will change that way you teach & the way your students learn forever! The ultimate differentiating Instruction & alternative assessment tool! Over 100 pages!