Differentiation Break students up into groups and have each group summarize the main takeaways from each slide 3-7. Have the groups share these summaries with the rest of the class. Modifications Extending the Learning The New York Times has an interesting article on Charles David Keeling and his research: https://nyti.ms/2jCmhVE. The Keeling Curve is often mentioned in the news and other media. Have students bring in articles that mention how many parts per million of carbon dioxide are currently in the atmosphere.
