This session will feature selected activities from the Weather and Climate middle school unit from the Science Education for Public Understanding Program (SEPUP) from the Lawrence Hall of Science at UC Berkeley. Participants will take the role of the student as they examine the relative amounts of carbon dioxide and oxygen gases at different times in earth’s history, and the role of living organisms in determining the composition of the atmosphere. We will then use an online interactive to analyze historical data related to climate change. Participants will receive a sample set of materials.