Curated OER
Educational Technology Clearinghouse: Maps Etc: North China, 1971
" North China includes the densely populated and intensively cultivated North China Plain, the loess-covered uplands of Shansi, northern Shensi, and eastern Kansu, and the sparsely populated, semiarid steppes of Inner Mongolia....
Curated OER
Educational Technology Clearinghouse: Clip Art Etc: Pope Sixtus V
Pope Sixtus V (December 13, 1521 - August 27, 1590), born Felice Peretti di Montalto, was Pope from 1585 to 1590. The subsequent administrative system of the Church owed much to Sixtus V. He limited the College of Cardinals to seventy;...
CK-12 Foundation
Ck 12: Analysis: Positions and Midpoints in Two Dimensions
[Free Registration/Login may be required to access all resource tools.] Position vectors and identifying midpoints in 2 dimensions