The European Organization for Nuclear Research (CERN, from the French), which employees over two thousand staff members and has hosted more than ten thousand fellows, associates, and apprentices, is one of the greatest international science projects in history. Educators will find a wide array of helpful resources on CERN's Teaching Resources site, including "presentations, recorded lectures, teaching materials, movies, animations, games, posters, photos, games and ideas for practical activities in the classroom." For instance, the 56-page, downloadable PDF of Jacques Deferne and Alain Gassener’s lesson, "The Amazing World of Atoms,” takes middle school and high school students through a colorful tour of the basics of atomic physics and chemistry. Other topics include antimatter, the Big Bang, and particle physics, as well as an introduction to accelerators.