This study is vital to improve the quality of assessment and address the different challenges in performing group activity. Students’ lived experiences were assessed using a phenomenological approach. The interview was used to gather data. Twenty students participated in the study. Under social relationships, students develop student interactions, make new friends. In contrast, trust with your groupmates in assigning the task, and the competition was developed. In the execution of the task, the majority of the students established good communication within the group, collaboration, and brainstorming which are core ideas of cooperative learning. However, there are some free-riding students; procrastination of task, the ideal number of groups, and lack of self-esteem become the barrier of low achieving students to participate in the brainstorming activities. Students become more engaged in learning, think critically and learn how to manage time. Performing as a group did affect the student’s social relationship, execution of task and students thinking process.