As with most human beings, teachers can be slow to change. Although evidence exists that modern technology at times can aid teaching, relatively few instructors employ it in their classrooms. Also, research findings are often ignored. These are negative characteristics of instructors that impede learning. In the lives of their students, teachers often achieve an influence beyond the intellectual knowledge they impart.
Adults often look back on a teacher who had a stirring and positive effect upon their lives.
Human teachers can make decisions that might be difficult for a machine. For example, a computer can judge grammatical integrity in a paper, but evaluating the worth of original ideas is impossible for today s machines. Many teachers are extraordinarily creative and develop new and better ways of teaching. By their presence, teachers stress that learning must be integrated into a world populated by intelligent and feeling beings. Teachers, helping students to understand and accept each other, can ease interpersonal problems that often develop.