Which of the following is NOT a goal of flexible grouping?

Pigeonholing students into categories is not a goal of flexible grouping because flexible grouping is intended to create dynamic learning environments that adapt to students' varying needs, skills, and interests. The purpose of flexible grouping is to facilitate differentiated instruction, which supports diverse learning styles and enables students to participate in a range of activities that can enhance their educational experience.

In contrast, the other options outlined—enhancing critical thinking, fostering collaboration, and encouraging communication—are indeed goals of flexible grouping. These objectives aim to promote active engagement among students, enhance their ability to work together, and develop their analytical skills through diverse interactions. By grouping students flexibly, educators can nurture a more inclusive classroom environment that values each individual's contributions while preventing the rigid categorization that pigeonholing entails.