Bring in books about emergencies and emergency personnel like firefighters and police officers. Put the books on your classroom shelves for students to explore during free time. Read books at story time to introduce the subject of dealing with emergencies. Talk with the class about how adults should be the ones who call 911, and that it should only be a child's job if there are no adults around.
Make a class chart about what an emergency is. Hang a large piece of paper at the front of the class. Divide the paper into two halves and write headings of "Emergency" and "Not An Emergency." Ask students for ideas of problems that would fit into each category. Give suggestions yourself. For instance, "Mommy burned dinner" versus "There's a fire in the kitchen." Children must tell you the appropriate category for each scenario.
Ask children to make pictures that show what they would do in an emergency if there were no adults to help. Once they've finished, each child should explain her picture to either one other friend, a teacher or the entire class.
Make pretend phones. Cut cardboard into rectangular pieces and let each child draw his own number grid onto his "phone." Tape a large picture of a phone on the floor of the classroom. Show children where the numbers to 911 are. Give each child a chance to "dial" by jumping on the correct numbers.
Put on a skit. Having children act out different scenarios will show if they understand what to do in an emergency and what still needs work. Pair children up and give each pair a different scenario. One child will play someone who's experiencing a problem. The other child must decide whether she needs to call for help, then use a pretend phone to do so. Have each pair perform in front of the class.