If you are looking for academic or cultural "papers" involving this term in a school context, they generally fall into these categories:
: A dissertation titled "Understanding the Pendejo Phenomenon in Puerto Rico" examines the term as a culture-specific psychological dimension and a stigmatizing attribute. Literary & Social Critiques pendejitas school
You may also be seeing references to a popular "brand" of humor. If you are looking for academic or cultural
: There is a widely available composition notebook titled "Don't be a Pendeja," marketed for school-age girls and students to use for journaling or notes. pendejitas school