International Date Line International Date Line The International Date Line (IDL) is an imaginary line of demarcation on the surface of Earth that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next. It passes through the middle of the Pacific Ocean, roughly following the 180° line of longitude but deviating to pass around some territories and island groups. The IDL is roughly based on the meridian of 180° longitude, roughly down the middle of the Pacific Ocean, and halfway around the world from the Greenwich meridian. In many places, the IDL follows
READ 180 structured engagement routines for English language learners, and the Scholastic Achievement Manager (SAM). A number of studies have been conducted regarding the effectiveness of using "READ 180" in the classroom. The company's webpage includes a searchable list of research articles. Below is a sample of some of the current research available on "READ 180". The U.S. Department of Education Striving Readers Project shows "READ 180" effective in combating adolescent illiteracy. The Institute for Educational Science (IES) What Works Clearinghouse recognized "READ 180" for potentially positive effects in comprehension and general literacy achievement. Slavin, Cheung, and Groff, and Lake (2008) placed