Two widely used measures of rigor are Bloom's Taxonomy and Webb's Depth of Knowledge Levels. Both measures of rigor go from the simple to the complex. Karen Hess' Cognitive Rigor Matrix integrates these models as a ...
Assessment Design: A Matrix To Assess Your Assessments
"Rigor is not established by the unthinking use of Webb or Bloom or other verbs."
"...just throwing some verbs around as starters for “rigorous” tasks is not enough to address the first bullet concerning the challenge of the task. Rigorous tasks are a function of cognitive demand and situational complexity, not just the verb used. Self-assess against our audit matrix to test your tests, therefore:
Discover a unique way to break down the Common Core into manageable groups. Using buckets, teachers and students will better understand expectations of the Common Core overall as well as what is expected during a particular lesson.