Links to some important documents. Most are found on the School Enrollment Task Force page of the Town web site (link provided below):

Updated Population and Enrollment Forecasts:
http://www.arlingtonma.gov/home/showdocument?id=28614
http://www.arlingtonma.gov/home/showdocument?id=28616

Updated Map of Enrollment Forecasts:
http://www.arlingtonma.gov/home/showdocument?id=28357

Priority Values (from Town Hall Exercise):
http://www.arlingtonma.gov/home/showdocument?id=28373

Parent Survey of Middle School Options:
https://drive.google.com/file/d/0B5twurMDsfzVOHFmbGF1TDNkVDg/view

Cost Estimates & Timelines of Options (some numbers have changed):
https://www.arlingtonma.gov/home/showdocument?id=27117

Elementary School Capacities when Built:
https://www.arlingtonma.gov/home/showdocument?id=27119

Current School Enrollment Numbers:
https://www.arlingtonma.gov/home/showdocument?id=26967

HMFH Space Study (with older enrollment forecasts):
http://www.arlingtonma.gov/home/showdocument?id=26963

School Enrollment Task Force:
http://www.arlingtonma.gov/town-governance/all-boards-and-committees/school-enrollment-task-force

Arlington School Committee:
http://www.arlington.k12.ma.us/asc/

And, because I worked hard on this a year and a half ago, here is the link to my old campaign web site:  https://jennifersusse.wordpress.com/