Ask the student what specifically is frustrating him. If it is a particular assignment, it is quite possible that other students are feeling the same frustration. Therefore, you should deal with the situation immediately.
Instruct the student to describe the assignment/situation in his own words. If he simply cannot do it, ask another student to explain the assignment. According to the Nursing Online Educational Database, focusing on someone or something else can help calm frustration. By focusing on another student, the frustrated student has time to put his feelings into perspective. If the second student also has trouble verbalizing the lesson, consider the possibility that you have not explained the assignment in understandable terms. Give additional explanation as necessary.
Ask the student if the assignment is clearer now. If the student responds positively, have him explain how he understands the situation. If any further clarification is required, provide it for the student.
Suggest that the student stay after class if he still does not understand the assignment. If the student is not able to stay after class, suggest another time that you and he can meet.
Tell the student to step outside of the classroom for a few minutes if he refuses or is unable to calm down within the classroom. It is entirely within an instructor's purview to dismiss an unruly student from the classroom. Stepping outside allows the student to clear his mind, which is another calming technique suggested by the Nursing Online Educational Database.