INFORMED CONSENT: The goal will be to enroll the parent who assumes primary or at least equal responsibility for the day-to-day management of the child's asthma. Written consent will be obtained by the RNA from the parent for (a) conducting the parental interview, (b) abstracting pre-identified data from the child's medical record data, and (c) obtaining permission to interview the child and have the child perform the spirometry maneuver. Verbal assent from the child to complete the interview and spirometry maneuver will also be obtained by the RNA. Subjects will be informed that they are free to withdraw from the study at anytime, that nonparticipation will not affect their or their children's healthcare, and that their names will not appear on study materials. We will use a unique 4-digit number to code their data and provide confidentiality. All consent and assent materials will be available in English and Spanish. Parents will decide which language they prefer.