I recently took my daughter (with her friend and friend's mom) on our own 8th grade Washington DC/New York City trip. We had a great time seeing the Washington monuments and going to a lot of the excellent (and free!) National museums. I tried to sketch as much as possible on site, but being on a trip without other sketchers doesn't allow for a lot of sketching time. I was able to convince the girls, however, to sketch with me in their own little books whenever we had a few minutes of downtime at restaurants, etc.
Here are my sketches done in my hand-made concertina sketchbook (made from a single sheet of Fabriano Artistico 140 lb. soft-press watercolor paper). I was forced to buy another sketchbook in NYC once I filled this one. Stay tuned for additional travel sketches in that sketchbook tour.