Center for the Arts 
Manassas art center with classes and workshops for adults and kids.

National Gallery of Art 
All the big name artists in one place.

http://www.doe.virginia.gov/instruction/fine_arts/visual_arts/strategies_correlations/index.shtml

K-8 VISUAL ARTS INSTRUCTIONAL STRATEGIES & CORRELATIONS

http://www.doe.virginia.gov/testing/sol/standards_docs/fine_arts/2013/visual_arts/std_finearts_visualarts.pdf
Visual Arts SOLs

https://www.makebeliefscomix.com/
Fun comic and storyboarding website, used by 4th graders already.

https://www.sketchup.com/plans-and-pricing/sketchup-free
SketchUp architecture and 3D design used by grades 3-5.