This document provides an overview of the frottage art technique created by Max Ernst in 1925. It involves rubbing charcoal or other media on paper placed over a textured surface to create an artwork. The document discusses materials and procedures for creating frottages, examples of frottage artworks, and related techniques such as brass rubbings and gravestone rubbings. It includes an agenda for a microteach session on frottage that involves demonstrating the technique, reflecting on results, and summarizing key points.