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Table 1 Content of teaching unit

From: Teleological explanations in evolution classes: video-based analyses of teaching and learning processes across a seventh-grade teaching unit

Period 1a: presentation of imaginary fish adapted to their environment; biodiversity in marine ecosystems; overview of evolution unit
Period 2: time scales of evolution: timeline from the origin of life until today
Period 3: comparison of vertebrate classes: amphibians and reptiles
Period 4a: evolution of whales: from the shore to the sea
Period 5: Darwin’s voyage and evolutionary theory: documentary
Period 6: evolution of camouflage in a colored habitat: model simulation
Period 7a: goal-directedness of evolution: discussion
Period 8: speciation through diversifying selection: evolution of giraffes and okapis
  1. aSequences of these periods are presented in the results section