Cell phones are likely made of gold—at least part of them! An interesting lesson explains the conventional and not-so-conventional uses of the popular element gold. From the Inca empire to modern-day technology, learners discover gold...

For this online interactive American history worksheet, students answer 12 matching questions regarding late 1870's-1914 America. Students may submit their answers to be scored.

Biotechnology changes lives every day, but how did it all start? Learn about Cohen and Boyer's technique for recombinant DNA and the founding of this new scientific study. Then, scholars use the online interactive to discover how Hanahan...

In this already and all ready worksheet, students choose the correct word to complete each sentence. Students complete 8 sentences.

Gain a deeper understanding of the Americas on this journey through 13,000 years of human ingenuity and achievement in the western hemisphere.