Free Tech for Teachers
PBS’s American Experience has a ninety minute program about the building of the Panama Canal, along with resources to support a teacher's use of the Panama Canal documentary in the classroom. The Interactive Panama Canal Map allows viewers to click on different parts of the canal and explore the challenges faced in building the canal and the technology used to construct it. The Timeline of the Panama Canal doesn't have any interactive elements but it does offer a great overview of the history of the canal. And as usual American Experience has some good lesson plan suggestions connected to the video.
Access these resources at http://www.pbs.org/wgbh/americanexperience/films/panama/player , and read a review of this resource at http://www.freetech4teachers.com/2011/12/exploring-panama-canal-lesson-plans-and.html