Might it be related to the fact where an overwhelming majority of high school students have their neighborhood school offering AP? Advanced Placement High Schools Centreville Chantilly Fairfax Falls Church Hayfield Herndon Lake Braddock Langley Madison McLean Oakton South County Westfield West Potomac West Springfield Woodson International Baccalaureate High Schools Annandale Edison Lee Marshall Mount Vernon Robinson South Lakes Stuart http://www.fcps.edu/dss/osp/StudentRegistration/student-transfer/infofiles/APandIB-list.pdf If you start to look at Test Results numbers (the most recent I can find under School Profiles are from 2013-14), when you compare high schools, IB high schools are doing quite well in terms of IB test participation rates AND scores. For example, comparing Falls Church (AP), Annandale (IB), and Stuart (IB): Falls Church: Grade 11 and 12 Membership 789 AP Participation # 358 AP Participation % 45.37% AP Exam Tested # 361 AP Exam Tested % 45.75% 3 or Better on AP Exam # 244 3 or Better on AP Exam % 30.93% Annandale: Grade 11 and 12 Membership 1107 IB Participation # 551 IB Participation % 49.77% IB Exam Tested # 389 IB Exam Tested % 35.14% 4 or Better on IB Exam # 315 4 or Better on IB Exam % 28.46% Stuart: Grade 11 and 12 Membership 796 IB Participation # 462 IB Participation % 58.04% IB Exam Tested # 317 IB Exam Tested % 39.82% 4 or Better on IB Exam # 204 4 or Better on IB Exam % 25.63% |