This research examines the perspectives of teachers and third-gradestudents on the development of communication skills through collaborative learning at a primary school in Phnom Penh during the 2024-2025 academic year. Through observations and interviews, the results indicate that collaborative methods enhance student interactions, increase active participation in group activities, and foster shared responsibility. Students demonstrated improved communication skills, such as active listening, confident expression of opinions, and constructive responses. Furthermore, this approach helped reduce shyness, boost self-confidence, and cultivate positive behaviors, including sharing ideas, mutual support, and conflict resolution. The study found that a safe and enjoyable learning environment promotes both academic and social success. The research recommends that future studies explore challenges in implementing collaborative methods, such as time management, equitable task
distribution, and addressing negative student behaviors. Understanding solutions to these challenges will enhance the effectiveness of this approach.

Key words: Teacher and Student Views, Grade 3, Communication Skill, Collaborative Learning