Answer:
1. Discuss with students what they already know about maps.
Divide students into pairs. Give each pair an outline map of the world and an outline map of the United States. Have students circle familiar characteristics and underline or list unfamiliar characteristics. Have a whole-class discussion about what they already know or notice about the maps. Students may recognize the shapes of countries, they may point out their state or region, or they may identify familiar bodies of water.
2. Introduce the concepts of latitude and longitude.
Have students look at the U.S. map and find the lines running across and up and down the page. Tell students that the lines running across the page are lines of latitude, and the lines running up and down the page are lines of longitude. Latitude runs 0–90° north and south. Longitude runs 0–180° east and west. Have students write those labels on the maps. Ask students why they think these lines might have been drawn on the map. Make sure they understand that they are not real lines on the ground; they were added to the map to help people locate places on the map more easily. Point out the degrees of latitude and longitude and the patterns of numbers as you move away from 0°.
Explanation:
. Have students practice figuring out latitude and longitude.
Have students find the approximate location of their town and mark it with a dot. Ask students to think about what to do if the location is not on a line but in between lines. Model for students how to figure out the town’s latitude and longitude. Next, draw two more dots in other areas of the country and have students work independently or in pairs to figure out the approximate latitude and longitude of those places. Finally, have students figure out what city is at approximately 30°N, 90°W (New Orleans, Louisiana) and what city is at approximately 40°N, 105°W (Denver, Colorado).
4. Have students find landmarks with the same latitude and longitude as their location.
Assign each student or pair one of the three locations—home, New Orleans, or Denver. Instruct each pair to find two landmarks, such as cities or physical features, with the same latitude as their location. Then have pairs find two landmarks with the same longitude as their location.
5. Discuss with students why and when latitude and longitude are helpful map tools.
Have students share why latitude and longitude are helpful map tools. Prompt them to explain how latitude and longitude can help them to identify specific locations. Ask: How easy or difficult would it be to pinpoint a location on a globe without using a coordinate system? Explain.
