HEATKEYS

Twenty sections of 225 study guides and exercises for learners, middle school through returning adult, in 32 languages.

Granta are experts in materials software, materials data, and materials databases. We help engineering enterprises to capture, manage, and analyze critical materials information.

This is the global Antimicrobial Copper website with information on the properties and applications of antimicrobial copper and copper alloys, with details of products and services offered by Antimicrobial Copper Cu+ approved companies.

Take free online classes from 115+ top universities and educational organizations. We partner with schools like Stanford, Yale, Princeton, and others to offer courses in dozens of topics, from computer science to teaching and beyond. Whether you are ...

The Carolina Population Center is a community of scholars and professionals collaborating on interdisciplinary research and methods that advance understanding of population issues.

The authoritative Collins dictionaries now available online. Search amongst hundreds of thousands of words and expressions in Spanish, French, German, Italian, Chinese, Portuguese, Russian and synonyms dictionaries.

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.

Scrivener for Mac OS X. Award-winning writing software for novelists, scriptwriters, academics or anyone working on long texts requiring research and structure.