Developed originally for grades 7-12, the three bilingual Mexican American studies curriculum units on the pre-Hispanic cultures of the Olmecs, Mayas, and Aztecs present information for the teacher and for the student, a glossary, worksheets, an answer key, a test, and a bibliography in Spanish and English. The cross section of materials are intended to deal with the learning problems of students with special language difficulties. Specific unit content is as follows: Olmec--origin, cultural sites, education, religion (spirits of nature, jagure cult, adoration of the dead, religious festivities, magical powers), and art; Maya--old and new empires, government, arts and sciences (architecture, literature, arts, sciences), and religion; Aztec--origin, territory of Tenochtitlan, government, royal line, religion (human sacrifice, Aztec deities), education, arts and sciences, literature, Aztec calendar, and customs (social tasks, food). Exercises for students include location of places on maps, matching, questions for short answers, definitions, multiple choice. The worksheets and tests are designed as duplicating masters. (RS)