I love, love, love this writing project! You can spread it out or speed up to suit your needs.
As teachers we don't get much positive feedback, but I get a ton of thank you notes for this one.
And the students enjoy it, too!
For each letter of the alphabet, students write about a memory.
I have my kids type them, but you could do hand written.
I recommend that you keep the pages till the project wraps up, so the kids don't loose them.