Learners correspond with Israeli students from Jerusalem by email as part of a study on desert and semi-arid regions. They conduct background research and become proficient in the use of electronic mail.

Thirteen short-answer questions follow a brief food web activity in a formative assessment designed to test knowledge of ecosystems and the energy that flows through them.

This site from the Encyclopedia Wikipedia provides an encyclopedia article on the prime meridian discusses the important principles were established at the International Meridian Conference in 1884.