Dr. Sandra Kaplan from USC created icons to represent elements that generate a deeper, more complex thought process.  Students involved in the learning process, whether it is reading text, watching a video, analyzing art, or listening to a presentation, can apply elements of depth and complexity as they begin to assimilate new information, make connections, and dig deeper into content. 
    The Depth and Complexity icons are used as a visual aid to strengthen thinking skills and cognitive operations.    Click on the link to learn more about the icons:  Depth & Complexity Icon Chart