Are You Ready to Be a Substitute Teacher? Practical Tips for Keeping Your Sanity is filled with practical advice for substitute teachers. The author, a substitute teacher in Chicago, uses humor to tell of her experiences. With those experiences as a background, she provides no-nonsense tips for other substitutes. The focus of the book is on kindergarten through 8th grade, although high school substitutes can benefit from Reynolds' suggestions as well. The last section of the book discusses some activities substitutes can use with students as well as some online resources for free activity worksheets.