www.inquisiminds.com has a great French classes and 150+ other classes in Springfield/Burke Mon - Fri options, quarterly as well so you don't have to commit to a year.

We go to Les Classes du Samedi at St Jane de Chantal in Bethesda. They're mostly for francophone, bilingual families, but have intermediate classes as well, I believe.

http://myfrenchclasses.org/

There is a class on Saturdays at the French Academy in Chevy Chase. Starts April 8th.
check on their site frenchacademy.us, then group classes for kids, then schedule.

Alliance Francaise has classes for teens.

Hi, we have just arrived to DC and are looking for a French class. We had a great one where we were previously and my teens are intermediate with grammar and speech. Has anyone found a tutor or class in the DC, preferably Capital Hill area? Thank you