This is a great young adult read. It has a really good story line that grabs you from the first chapter and even has time travel in it. If I were still in the classroom, I would certainly use it as a read aloud. I would recommend this to any 4th grader on up. :)
Summary from goodreads:
When thirteen-year-old Margaret's father is unfairly sentenced to death by the cruel Judge Biggs, she is determined to save him, even if it means using her family's secret-and forbidden-ability to time travel. With the help of her best friend, Charlie, and his grandpa Josh, Margaret goes back to a time when Judge Biggs was a young boy and tries to prevent the chain of events that transformed him into a corrupt, jaded man.