The lesson plan introduces 3rd grade students to the concept of guide words to help them locate information in reference sources. Students will learn that guide words indicate the alphabetical range of words on each dictionary page. To engage students, their names will be sorted into alphabetical categories based on the first letter. Then, students will complete a worksheet practice using guide words to determine if example words would appear on pages. By the end of the lesson, students should understand how guide words are used to navigate reference materials alphabetically.