Curated OER
Extraction of Caffeine from Tea Leaves
Students conduct an experiment in which they extract the greatest number of grams of caffeine from four bags of tea. They conduct Internet research, conduct the experiment, and record their observations and data.
Curated OER
Teaching about the Rainforest - Classroom Ideas
Students are introduced to the tropical rainforest through different ways that catch their attention such as: Visit a local botanical garden or conservatory so that students can see the variety of tropical plants in the world. They...
Curated OER
Related to Natural Products
High schoolers examine how the microwave delivers energy at different power levels. They work together to complete experiments on various materials and different power levels. They answer discussion questions to end the lesson.
Khan Academy
Khan Academy: Purification of Caffeine
Read the passage "Purification of Caffeine," and complete the five-question quiz related to purification techniques and chemical reactivity.