I am writing about an article by Kenneth J. Cooper titled "Teacher Training: Slow Changes" {front page, June 3}. He is so right, and the changes that do take place don't last very long.

Teaching strategies are based on fads. A leading educator (or entrepreneur) develops a new procedure, workshops are scheduled and the techniques are widely disseminated. Then the procedure falls out of favor, and a new fad comes along. Witness the rise and fall of team teaching, the open classroom and assertive discipline.

A quotation by W. Scott Westerman, dean of education at Eastern Michigan University, reflects this observation well, "If there is some new package that some entrepreneur has sold to a district, our students know about it."

There is, however, one approach that readers of The Post should be aware of that is different and that receives little publicity. It is the same approach that is used in special education, helping people with weight control and the cessation of smoking. It is referred to as the science of behavior, behavior analysis or behavior modification.

It is the teacher's job to change the behavior of his or her pupils. The theory and techniques are based on research that goes back several decades, and we know they work because of this research. While many individuals do not understand or appreciate the behavioral position, there are serious efforts underway to help teachers learn and use this approach in their classes. The general public will hear more of the science of behavior in the future.

DONALD K. PUMROY College Park The writer is a professor of education and psychology and director of a school psychology program at the University of Maryland.