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Explains what comma are and how they are used in sentences.

Young readers learn about growing beans from a story about a girl who watches them sprout.

The creative examples, simple text, and art in this series help students learn primary math concepts.

The creative examples, simple text, and art in this series help students learn primary math concepts.

Discusses motion in space, including the Earth's rotation around the Sun and the revolution of the Earth, the Moon, and the other planets around the Sun.

Describes water, its uses, its three states, the water cycle, and how to conserve it.

At first, master artist Rembrandt van Rijn rebuffs his young son Titus and his attempt at art, but gradually Rembrandt is won over by his enthusiasm and persistence, and begins to teach Titus the basic techniques of drawing.

Examines the properties and uses of rocks and minerals.

If you were a comma, you would separate words. You could put Walter, Roxie, and Harry on a team. You could go skating, sledding, or hiking. What else could you do if you were a comma?

A scene at the park changes throughout the four seasons.