In today's world of accountability and litigation, physical educators face an everyday battle of defending the merits of their programs. While strong professionals eagerly promote their programs, many issues continue to reflect negatively on physical education, thus putting a damper on the physical activity of children. "Stings," characteristic within an ailing program, reduce interest and activity in the children it serves. This article lists ten items, the Killer Bs, that tend to reduce the effectiveness of elementary physical education programs. A "Killer B Assessment Form" is offered as a springboard for professional development by suggesting an avenue for program assessment.