Chapter 21 of Ecce Romani I is rich with derivatives from the four sets of vocabulary in the chapter. I elected to choose derivatives from the four vocabulary sets and combine them into one lengthy (97-slide!) derivative PowerPoint slideshow. Any teacher who is interested in doing so can break this PowerPoint slideshow into two or three presentations. As per usual, the slides contain colorful pictures, Latin root words and their meanings, parts of speech and the definitions of the derivatives.