FYI - Mt. Vernon is slated to go to a full dual immersion program to close the achievement gap for ELL students.
http://esbpublic.acps.k12.va.us/public_itemview.aspx?ItemId=5798&mtgId=596
It doesn't say if they will continue to allow parents to opt out but it does say that parents will be able to opt in from around the City.