CK-12 Foundation
Ck 12: Geometry: Ratios and Proportions Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide reviews ratios, proportions, and cross-multiplication.
CK-12 Foundation
Ck 12: Biology: Evolution of Multicellular Life Study Guide
This comprehensive study guide covers the main terms and concepts needed for a unit on the evolution of multicellular life.
Khan Academy
Khan Academy: Egyptian Mummy Portraits
This type of portrait appeared in Egypt in the first century C.E., and remained popular for around 200 years. Egyptian mummy portraits were placed on the outside of the cartonnage coffin over the head of the individual or were carefully...
Khan Academy
Khan Academy: Development of the Buddha Image
There is significant debate concerning the development of the Buddha image--where it first occurred, why, and when. Broadly speaking, the image of the Buddha emerged during the first few centuries C.E. in two major centers of Indian art...
Other
The Stoa Consortium: Acropolis: The East Slope
The East Slope of the Acropolis is an area that has not (yet) been the focus of a great deal of archaeological investigation. Early travelers and explorers noted, of course, the very large and prominent East Cave that forms such a...
Other
Tone Savvy: E Music Theory
This site provides good online learning games and exercises for music theory. It also has a lot of options for teachers if they choose to subscribe.
Curated OER
Educational Technology Clearinghouse: Maps Etc: Drawing Asia, 1872
A chart from 1872 illustrating instructions for drawing Asia. "General instructions for drawing the continents. Make a scale by marking on a slip of paper or pasteboard the measures 1,2,3, etc., as on the sides of this map. Every measure...
Curated OER
Educational Technology Clearinghouse: Maps Etc: Drawing North America, 1872
A map exercise from 1872 for drawing North America. The map shows the general outline of the coasts, major waters and rivers, and a vertical profile cross-section of the continent from the San Francisco Bay area to Cape Hatteras....
Curated OER
Educational Technology Clearinghouse: Clip Art Etc: Cornu
A wind instrument, anciently made of horn, but afterwards of brass. Like the tuba, it differed from the tibia in being a larger and more powerful instrument, and from the tuba itself, in being curved nearly in the shape of a C, with a...