AP sciences are few and far between in Minnesota high schools. That is one of the reasons my son is enrolling in the EPGY Online High School for the coming school year. But, to this state's credit, there are abundant opportunities here for eleventh-grade and twelfth-grade students here to dual enroll in colleges (including the U of MN) for high school credit on the state's dime,
http://www.ohe.state.mn.us/mPg.cfm?pageID=797
and indeed many of the successful applicants to Ivies here have that as their "high school" background. Both here and nationally, the early college phenomenon is largely a response to the lousy high school phenomenon--but where that is the possible response, dual enrollment is the prudent thing to do.