Margaret and Rachel's work in Bradford convinced them that they should concentrate on trying to improve the physical and intellectual welfare of the slum child. In 1892 Margaret joined Dr. James Kerr, Bradford's school medical officer, to carry out the first medical inspection of elementary school children in Britain. Kerr and McMillan published a report on the medical problems that they found and began a campaign to improve the health of children by arguing that local authorities should install bathrooms, improve ventilation and supply free school meals.