First of all, you need to decide what you want to say about why the past is important -- to the characters in the film and to us in everyday life.
Then make sure you follow the writing process:
1. Prewriting: Brainstorm, research, plan, outline, thesis statement
2. Writing: Write first draft by starting with section II of your outline; write the introduction after the body of the paper is written; write the conclusion last.
3. Polishing: Revise, concentrating first on the body of the paper, then the intro, then the concl (revision = making sure ideas are logical and sequential and support your thesis); proofread (spelling, grammar, usage, etc.)
Do you have a thesis yet? Have you done your brainstorming (and maybe research) yet? Have you written an outline?
Click on Step by Step for the writing process.
Check in the Essay & Research Paper Level.
My 3 ideas for it is, by the past Walter was given something to believe in. From the past Walter could understand the different characteristic for the 2 uncles and the past helped Walter understand the relationship between the 2 uncles.
But I am confused with what the teacher means by worthwhile in the film