Two bombs exploded at the Boston Marathon on Monday, April 15, killing three and injuring more than 260. The pressure-cooker bombs sent shrapnel at leg-level, leading to amputations for 15 victims. An immediate concern was how to deal with the feelings of school children whose sense of safety was shattered by the blasts. As the city healed, Boston businesses, foundations and individual donors worked with Mayor Thomas M. Menino and Gov. Deval Patrick to raise more than $30 million for a One Fund Boston. The fund was designed to support the families of those killed and help pay what were sure to be exorbitant medical bills for amputees and other victims. Tragedy can inform education, educators and public policy, if they are open to change and disciplined and focused in their reactions.