The purpose of this study is to assess whether comprehensive care enhanced with new technology to optimize asthma care in the home (using both a special sensor to track inhaler use and a hand-held PIKO-1 device to assess patients' forced expiratory volume in the 1st second [FEV1]) is effective in reducing total days when medical treatment is given outside the home (in clinic, emergency department, or hospital) among children with severe asthma receiving comprehensive care.