http://www.educationnews.org/ednews_today/154424.html#comment-30853. Frankly, I am NOT surprised. Are you?
As a former teacher, and current school attorney, I found that direct instruction worked best for my students (who were at all achievement levels). Now, so many years later, it’s gratifying to see research confirming that approach.
Of course, a blend of approaches– direct and problem solving–is probably the way to go.