Some thoughts about the books overall and whether or not the book is appropriate for High School students.

First, I do not believe the book is appropriate for most students at a 10th grade level. Most students at this level have not yet learned the ability to entertain a thought without accepting it.
They are too quick to accept Orwell as being correct in most or all aspects.

Many go into the book being told that Orwell has predicted the future, one must remember that because he predicted certain aspects of modern life as well as modern day issues that other things he says will come to be true.

The book was rather lacking of a story line whether this was intentional or not to. This may of been to show the lacking of emotion, repetitiveness of daily life, or lacking of color overall in their society it makes the book rather uninteresting to read as a non-assignment for most high school students