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In this simulation, learners model two elephant seal populations and how they change over time. Learners start with cards representing a variety of seals.

Learners use a variety of beans to represent a variety of species, and scatter these beans over a large piece of paper representing the environment.

Learners draw and describe a leaf, and then re-find leaves drawn and described by other learners. Learners can observe leaves outside, or leaves may be brought into the classroom.

Learners measure irregularly shaped bones using a variety of measurement methods and tools. Then, they measure again using standard conventions and metric tape measures.