Does the Common Core handle all your challenges with rigor? Check out my newest article, Rigor and the Common Core State Standards: Just the Beginning to see. Here's an excerpt:
The foundation of the Common Core State Standards (CCSS) is a focus on rigor. Developed in the midst of perceptions about lowered expectations for our students, the Standards provided a well defined set of expectations for each grade level in the areas of English/Language Arts, Literacy and Math. The standards set rigorous benchmarks, but the impact on student learning will depend on the implementation of the standards.