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In this activity, learners explore how objects can have positive, negative, or neutral charges, which attract, repel and move between objects.

This activity was designed for blind learners, but all types of learners can explore the three states of matter by examining tactile models that illustrate the characteristics of particles in each sta

Learners test their "light-smarts" by playing a game called "Light Quest!" The game board represents an atom and each player represents an electron that has been bumped into the atom's outer unstable

In this lesson, learners cut paper into very small pieces to explore the small size of quarks, the smallest thing we know of on Earth.