The DVD version of the movie . . .

Rating: Null/10 (19 April 2000)

is definitely worth buying because it features recent interviews with all the key figures including Gregory Peck. You also get to see Scout and Jem, all grown up.
I expect this film continues to be used in schools as a platform for discussion of contemporary social issues.
It would be a shame, however, if the movie were to be used as an simple substitute for the book, which explores a greater number of issues besides that of race. In addition the book nicely employs a couple of literary devices, which, in the hands of a skillful teacher, would be accessible to unexceptional high school students. And of course the story is riveting.