Designed to assist bilingual teachers in providing a coordinated program of studies for students in the Connecticut Migratory Children's Program and others whose native language is Spanish, this bilingual-bicultural mathematics curriculum guide for third grade is one of a series for preschool through fifth grade. The overall focus is on Puerto Rican history and culture, placing development of skills within the context of the experience and social identity of the child. A sequential approach is utilized. The guide contains eight units, related to those in the other third grade guides: Connecticut, Puerto Rico, Latin America, Europe, Asia, Eskimos, American Indians, and Africa. Appropriate skills are presented in each unit; for example, the skills in the Asia unit are: regrouping once in addition and in subtraction; identifying value of U.S. coins, combining coins, and computing their sum; making change for $1.00; writing money using dollar sign and decimal notation; applying money skills in a Japanese American Market Day. Key vocabulary words are listed with each skill. Activities to motivate students to learn each new skill are described. The illustrations provided can be copied for instructional use. Much of the material is given in Spanish and English. (MH)