In this lesson, students revisited their previous assignment on identifying lines of symmetry before diving into the concept of sorting objects based on specific criteria, such as grouping animals by species or habitat. The teacher introduced the Carroll diagram as a tool for sorting, using examples to illustrate how numbers and animals can be categorized according to rules like being odd numbers or living in certain environments. Essential materials for the lesson included animal cutouts, number cards, a Carroll diagram template, and the objective was for students to learn to read and interpret Carroll diagrams effectively.