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Learners combine different plant solutions -- made from fruits, vegetables, and flowers -- with equal amounts of vinegar (acid), water (neutral), and ammonia (base).

Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves.

This guide outlines how to plant a garden even if you don't have a yard!

In this activity, a group of learners work collaboratively to design and construct a paper model showing the evolution of an environment through multiple stages, from prehistory through the modern cit