Young children often hit when something doesn't go their way. This is an easy method that you can use in your classroom or home. I used it in my preschool class with 2.5-year-olds and it works!
Simply read a book everyday about hitting and discuss with the children as you read. "How did he feel? Why did she hit her friend? How did his friend feel when he hit him? Did hitting her help her get what she wanted?" Discuss what the hitter could say instead of hitting.
Then give the children a script to say when someone hits them, preferably one that echos the words in the book, but something simple, like, "No hitting! Hitting hurts!" Remind them about the script when they tattle (and remind the hitter to use his or her words next time).
You can adapt this script to other behaviors, like pushing or biting. Download the file for suggested titles and more description. If you have other suggested titles, leave a comment and I'll add them so that everyone can reduce aggression in their classrooms and homes!