If possible, bring a GPS to class. You can do some experiments, find some routes and talk about how it works.

Share your knowledge and experiences with the class and together try to answer these questions:

• Why do we use GPSs?
• Are they useful?
• How do they work?
• Have you used one?
• What was your experience?
• Do you have an anecdote about a GPS?

Rules for speaking in class:

• Raise your hand to speak. Your teacher will tell you when it’s your turn. If you all speak at the same time you can’t hear your classmates’ experiences.
• When a classmate is speaking, listen carefully. Even if you know what they are going to say, they deserve your attention as much as you deserve theirs.
• Don’t talk too much. Time in class is limited. Contribute your important ideas and discard the rest.
• Don’t remain silent. Contribute at least one idea or opinion. Everybody counts.
• Don’t make fun of anyone. Being rude contributes nothing to a debate. If you respect your classmates, they will respect you.

After listening to all the contributions, write down the ideas and opinions. Open the attached file and answer the questions.

• What is a GPS? Why do we use GPSs? How do they work? Explain what you know.

• Explain an experience one of your classmates had with a GPS.