Yes the photos in this gallery are from the 19th annual open house held on Nov 4-5 2011. I was only able to attend the Friday event, which is open to visitors for 4 hours. I was able to get photos of all of the programs that are held in the main building, though I somehow missed the room where the 1st year woodworking students learn drafting and basic tool skills. The Preservation Carpentry program is located in Arlington MA, and there was a shuttle van to visit that, but I just didn't have time to do both. There is also a locksmithing program elsewhere in Boston.
I believe the open house usually occurs on the first weekend in November. If you check the open house page on the nbss website, they have full details plus a gallery of photos from recent events.