Curated OER
Gas Prices Keep Rising
Students discuss rising gas prices, then read a news article about how the increase in fuel cost may affect other prices. In this economics and current events lesson, the teacher introduces the article with a discussion and vocabulary...
University of Pennsylvania
From the Dreyfus Affair to the World Today
Historical events do not occur in a vacuum. Such is the case of the Dreyfus Affair, where the connection between Captain Alfred Dreyfus, Emile Zola, and Hannah Arendt is fused by the events of the early 20th century. The informative...
Curated OER
Indicator Sponge A Discrepant Event Demonstration
Students explore the use of acid and base pH indicators. The teacher saturates an indicator sponge with congo red solution. Afterwards, the sponge is placed in a blue base solution. Students observe that the blue sponge actually turns...