Are you implacable or placid? Are you apathetic or empathic? Though these pairs of words are nearly opposite in their meanings, they are closely related and easily defined by students who know the Latin root,— "pacere" —(to please) and the Greek root pathos (suffering). K 12 's Vocabulary program uses the Vocabulary from Classical Roots program (from Educator's Publishing Service) to build knowledge of Greek and Latin words that form the roots of many English words. The purpose of the program is to help students unlock the meanings of words from classical roots, not necessarily to memorize lists of difficult or obscure vocabulary words. These polysyllabic words are those that frequently cause students to stumble and often appear on standardized tests. Throughout this program, students will define and use words with Greek and Latin roots, and use word origins and derivations to determine the meaning of new words, as they increase their own vocabularies and develop valuable test-taking skills.