Effective communication for people (true for both students and non-students alike) is important for a few reasons.
First, effective communication insures that listening (not hearing) takes place. Listening insures that what is being said is understood. If the dialogue is not understood, one can ask what is meant by something said.
Second, effective communication saves time. if people do not effectively communicate, time is wasted. Instead of compromises, conflict ensues and nothing will ever get accomplished.
Third, effective communication includes a balance between verbal and nonverbal communication. For example, if a person is verbally communicating that they are happy, but the face (nonverbal communication) states otherwise, the message can be conflicting for the listener.
Lastly, effective communication also takes into consideration the emotions of each party involved. If one person involved in the conversation is overly emotional, and the others do not recognize this, then the conversation is not effective.
Not only is effective communication important in life in general, it is also an important skill to master in the formative years. By listening, paying attention to the emotions of teachers and other students, and balancing verbal and nonverbal communication, an academic atmosphere will have less conflict and more time to prepare the student for later in life (given the conflict is lowered and the time spent learning is raised).