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This activity guides the analysis of a published scientific figure from a study that investigated how gene duplication contributed to the evolution of electric fish.

This activity explores images of planarians regenerating missing body parts, which serve as phenomena for learning about cell division and differentiation.

This activity analyzes a published scientific figure from a study that investigated the biological importance of sleep. In this study, scientists tested whether sleep plays a role in removing harmful substances from the brain.

This activity explores an image of early embryonic cells, which serves as a phenomenon for learning about cell division and development.

This activity guides students through building a conceptual model of how carbon dioxide affects Earth’s climate.