Very large, overcrowded school/classroom in our FCPS ES. Poor classroom behavior by other students that isn't quite tolerated but also isn't effectively dealt with. Virtually no adult supervision during lunch (and DS is severely allergic to peanuts/tree nuts, so this is an issue). DS's FCPS ES is fine academically, but I think English fundamentals are sorely lacking (where are the grammar lessons and spelling tests??)
But my primary takeaway is that the ES feels institutional. Large groups of kids are herded through, and the teachers are really only equipped to deal with the kids who stand out for some reason.