Parents who lobby their children's schools for better or increased educational resources may be providing a schoolwide public good. However, they may also be capturing a larger share of school resources, possibly leaving other families worse off. A regression of within-school variation in input quality on parent-initiated school contact identifies this "private-good'' effect, using involvement in civic organizations to instrument for contact. A 10 percent increase in the probability of parental contact raises the probability of inclusion in a gifted program by 2 percent to 3 percent. At the average school, the highest "non-gifted'' students significantly outscore the lowest "gifted'' students, suggesting that this lobbying crowds out deserving students. Alongside these private-good effects, involved parents also provide public goods: again instrumenting with civic involvement, higher participation in a school's parent-teacher organization leads to a higher probability that principals frequently observe and evaluate all teachers at that school.