In the current period of time, the tendency of working in groups is being encouraged in most fields of life, stemming from the concept that “Collective intelligence is always brighter than the intelligence of each individual”. Collaborative work is considered to be a fundamental factor in the effectiveness of human resources. Team-working means getting people to work together well on a task and looking forward to a common goal. This way of working will help individuals to complement each other’s shortcomings and improve themselves. The following article will study how crucial group work is in developing learners’ ideas, improving their cooperation, and engaging in their in-class activities. The aim of the article is to provide both teachers and learners with better academic knowledge and understanding of the benefits that collaborative learning would offer in the real English classes in Vietnam; hence, inspiring learners to take more advantage of group work.