The Common Core State Standards provide a consistent, clear understanding of what students are expected to learn, so teachers and parents know what they need to do to help them.

Standards for K-12 English and Language Arts curricula as well as lesson plans.

The National Council for Teachers of Mathematics offers national standards and lessons for preK-12 grade

This is great site for teachers it provides teachers with a lesson planning center at every grade level

Great Site that includes numerous resources for teachers!