My son has ADHD and I know the frustration of keeping him focused on school work, I can not imagine the effort you put in every day but engaging them is an amazing idea. I was suggested to do that by a friend who is an educator and it has helped with my son.
As for the movie I am guessing either 1492 or Last of the Mohicans (Daniel Day-Lewis).
RE: That's Edutainment! Teaching The Age of Exploration/Discovery/Expansion to Students with Learning Disabilities Part I