501 Writing Prompts
This book has many suggestions for writing prompts for Persuasive, Narrative and Expository writing. A great tool to use quickly.

A Usefull Writing Tool
I teach writing to home school kids and have been surprised by what inspires them to write-- HINT: it's not the standard ideas found in most text books. 501 Writing Prompts has a wide variety of topics for writing and includes "how to score" information for each essay category. This book would help students practice for the essay portion of the SAT or other standardized test. If you're looking for something to teach you ABOUT writing, or HOW TO write, this isn't it. It is simply a thorough collection of ideas to spark a student's writing. (Examples of good, mediocre, and poorly written essays are included for several of the topics.)

Writing Prompts for High School
I've used this book for journal writing every day. The students like to choose the prompts and write them on the board. It's been a helpful resource.

Excellent Book for Essay Writing Practice
This is a great book to get ideas for essay writing practice. It is divided into four sections with Persuasive, Expository, Narrative and Literary writing prompts. There are also graded model essays to show what is expected of students in the SAT exams. It is interesting to see what will give you a mark of 6, 4 and 1!! With 501 writing topics to choose from, you are guaranteed to get plenty of experience as a writer. I think it's a book worth having.

EXCELLENT RESOURCE FOR A FIRST-TIME WRITING TEACHER
This not only gives you 501 writing prompts (some not all that great, but there are so many it makes up for that downfall)... it gives you samples of different student writing that fits each style - personal narrative, persuasive, etc. - and rubrics for each style also! I wasn't sure what I was going to do when I was told I was going to be teaching writing to secondary students, but this book eased a lot of my fears and helped me through!