In Common--great Common Core lesson examples for both math and ELA. It also includes student writing samples.

In Common

Wonderful math curriculum guides by Engage NY (New York) and Common Core

Engage ny

These learning modules for  grades K-12 are wonderful!  Lessons include a fluency practice (called a "sprint"), lesson development with sides notes for good instruction, an exit ticket, and sometimes a homework assignment.   Great lessons, great instruction for developing conceptual understanding, without forgetting about fluency!