The three children's books that I have chosen to discuss that were made into feature films are Freak the Mighty, Hatchet, and Holes.
First, Freak the Mighty, a novel with a movie version called The Mighty, is a wonderful, heart-warming book that shows how friendship can overcome many of life's obstacles and teaches the moral lesson that people shouldn't be judged just by looks alone. This is one of my favorite books, and I teach it to my seventh grade classes every year. We also watch the movie and, usually, students enjoy both about the same. While the book and the movie do have the basic plot and characters, some minor details are changed--how the boys meet, how exactly Kevin finds Max when Max is kidnapped by his father, etc. Of course, these changes are more than likely included for "dramatic effect," but I never understand why the book just can't be left alone and the movie follow it more precisely. Still, I guess that is why I am a middle-income teacher and not a multi-millionaire movie producer. Go figure!
Again, another of my favorite children's books which is not very much like its feature-film version is Hatchet. The movie version is actually called A Cry in the Wild, which is why I had a difficult time finding it the very first time I taught this book. While the plot is basically the same--Brian Robeson is the sole survivor of a plan crash in the middle of the Canadian wilderness, left to try to live on his own--many elements of the book are changed, especially with the inclusion of a mysterious white wolf who comes to Brian's aide in the movie but is never once mentioned in the book. Probably, dramatic effect--again--is the reason for this, but I think that the novel has enough excitement and adventure that nothing else should be added.
Finally, the book Holes is actually a book with a feature film version that actually follows the novel very well. In fact, I really can't think of any major changes between the two. How refreshing! I can say that the only down-side to this would be the fact that a student could watch the movie, not really read the book, and still pass the AR test. However, it is nice to know that the producers thought this book well-written enough that nothing had to be changed or dramatized.
Sttill, I do always try to show a video version of a story, if possible. I think this helps the students see if their visual interpretations of the characters, setting, and plot are like that of the movie producers. However, sometimes, as I have found with the novel The Outsiders, watching the movie can corrupt one's imagination into always seeing the actor's' face every time that character is mentioned. For example, I always picture C. Thomas Howell each time I teach The Outsiders and start reading about Ponyboy. Sometimes, I wish I didn't do that, but I don't seem to be able to stop myself.