You can find free readers' theater scripts on-line or make them yourself. Teaching Heart is a website that has readers theater for elementary students scripts for kindergarten through third grade. These would be appropriate if you are a Title I teacher or have a group of struggling readers in your elementary classroom. Another great website with several readers theater scripts is Timeless Teacher Stuff. You need to scroll down to the middle of the page to find the readers' theater for elementary students scripts.
You can also take one of your students' favorite leveled readers and turn it into free readers' theater scripts. You can have a narrator who reads the text and different readers who read the characters' dialogue. You can also type up your own script based on the book. You may want to write your own free readers' theater scripts because you know your struggling readers best, and you will know what vocabulary they'll be able to handle in the script. Whatever you decide to do--have fun and watch your students improve their reading skills!