classes:  lecturer. lecturers convey knowledge in a mechanical, ineffective way, creating a stressful, depressing learning space for students.  curriculum. lecturers convey knowledge in a mechanical, ineffective way, creating a stressful, depressing learning space for students.  facility. lecturers convey knowledge in a mechanical, ineffective way, creating a stressful, depressing learning space for students.  general. lecturers convey knowledge in a mechanical, ineffective way, creating a stressful, depressing learning space for students.