This document provides guidance for scientists who want to bring their research into K-12 classrooms. It outlines why scientists should visit classrooms, how to plan a classroom visit by considering logistics, activities and materials, what to know about different grade levels, tips for the classroom visit and follow up. Scientists are encouraged to make their research real and exciting for students through hands-on activities and demonstrations. Proper planning with the teacher is emphasized to ensure classroom visits are engaging and age-appropriate.