This document discusses equal parts of a whole using examples of splitting cookies. It explains that for a fair share, each part must be the same size. It then lists different numbers of equal parts (halves, thirds, fourths, etc.) and the name given to each individual part based on the number of total parts the whole was divided into (e.g. if divided into thirds, each part is called a third). The document provides instruction on a video and quiz about fractions as well as math problems and an exit ticket involving naming parts of shapes.