The Performance Indicators for NRHS Competencies are classified according to their level of complexity on Webb's Depth of Knowledge Chart.
DOK is NOT...
...about verbs. The verbs are a valuable guide, but they can sometimes be used at more than one level.
...about "difficulty". All levels of DOK have a place in a rigorous curriculum.
...about what FOLLOWS the verb. What comes after the verb is more important than the verb itself.
...about the complexity of mental processing that must occur to complete a task.
Many educators are more familiar with Bloom's taxonomy than Webb's levels. Here's a side-by-side comparison: