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Das Klassenzimmer ist ein kostenloser Service für Schulen
The classroom is a free service for schools. A learning library is available to you, for free.
Thousands of interactive exercises, videos, and articles at your fingertips. Study math, economics, (arithmetic, algebra, geometry, trigonometry, statistics, calculus), humanities (US history, US government, and politics), and more (including computer science principles) and much, much more. Connect with the academy and do assignments on the go.