Curated OER
Science Kids: Science Images: Amplitude Modulation
A simple picture showing amplitude modulation. The thin line goes quickly from top to bottom as it moves from left to right.
Curated OER
Educational Technology Clearinghouse: Maps Etc: Pre Colonial Africa, 1872
A map of Africa showing the continent prior to the Berlin Conference of 1885, when the most powerful countries in Europe at the time convened to make their territorial claims on Africa and establish their colonial borders at the start of...