classes:  lecturer. During the process of solving the assignment until the end of the assignment, the student cannot understand why the result is given and also does not know which result is correct to record.  curriculum. During the process of solving the assignment until the end of the assignment, the student cannot understand why the result is given and also does not know which result is correct to record.  facility. During the process of solving the assignment until the end of the assignment, the student cannot understand why the result is given and also does not know which result is correct to record.  general. During the process of solving the assignment until the end of the assignment, the student cannot understand why the result is given and also does not know which result is correct to record.