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Have you ever wondered how NASA designs, builds, and tests spacecrafts and hardware for space? How is it that wildly successful programs such as the Mars Exploration Rovers could produce a rover that lasted over ten times the expected prime mission duration? Or build a spacecraft designed to visit t... More

Take a journey to planet Earth and beyond to explore 15 different science topics ranging from fossils to the solar system with these engaging texts. Leveled Texts for Science is designed to help all students grasp important science concepts through high-interest science material written at four diff... More

This collection of essays represents current research in modern (post-1800) Chinese history. All contributors are former students of Professor C. Martin Wilbur, one of the great names in the China field over the past forty years, who recently retired from a long tenure as modern Chinese historian at... More

Uncover how and why things work in our universe with 15 essential scientific concepts that involve topics in states of matter, The Periodic Table, vibrations and chemical reactions. This resource provides suggestions for differentiating instruction to meet the needs to all readers and offers four vi... More