before we implement

I just noticed this editorial comment at the head of McCallum's paper on "encouraging classroom discussion of scientific papers":

The technique proposed by Malcom McCallum to encourage discussion of scientific papers is one of the many creative ideas that ecology teachers have developed to engage our students. While Malcom was able to use some creative assessments as well as his observations of students to support his conclusions, I would encourage everyone to consider how we could measure learning gains before we implement new or novel teaching techniques.
Dr. William Bromer 
editor of Ecology 101

Clearly, this man has never attended ed school.