The crossword solution for the term HIGH SCH. SUBJECT is HIST, which stands for History. History is an academic discipline that studies the past and is considered one of the oldest academic disciplines. It is a broad field of study that covers the events of the past, including political, economic, social, and cultural developments. History is often divided into periods, such as Ancient History, Medieval History, and Modern History. Historians use a variety of sources to study the past, including written documents, archaeological evidence, and oral histories.