Grades 6–8. During this unit students work to answer the question, "How could things living today be connected to the things that lived long ago?" They develop a model for natural selection and use it to account for patterns between the body structures and behaviors of ancient fossil organisms and similar organisms living today.

Unit materials are available as a 1-class unit kit (item #524801), 1-class refurbishment set (item #524804), 5-class unit kit (item #524801U5), and 5-class refurbishment set (item #524804U5). Carolina Certified Version*.

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*All enhancements to materials and instruction for this Carolina Certified Version of the unit are approved by OpenSciEd to preserve the integrity of the storyline and the instructional model.