UEN:
Customize your own rubric here! This UEN link has access to 8 different rubrics for Language Arts, each of which can be modified to meet the needs of you and your students.
SAGE Rubrics:
Utah Compose Rubrics:
Six Traits of Writing (by Trait)
Utah Compose and SAGE:
SAGE + Utah Compose (Explanatory)
SAGE + Utah Compose (Argument)
This page has some great resources from the Utah State Board of Education, including but not limited to: digital books, the Toolkit for Struggling Readers, Open Source materials, performance tasks, and rubrics galore!