This guide, the first in a series of three, provides the Spanish-speaking intermediate science student and teacher an opportunity to review selected science concepts and processes through activities which emphasize the applicability of scientific knowledge in the professional world. The three components in this guide deal with (1) ecology (what marine science workers do, environmental problems in marine science, and ecological factors in marine science); (2) health (functions and characteristics of cells, the results of improper nutrition, and selected jobs in the health field); and (3) the need for communication and measurement skills in construction careers, with emphasis on using the metric system. The activities in each of the components reinforce the student's skills in processes such as classifying, interpreting data, and controlling variables. Each activity contains an objective, key words, and a listing of materials needed to complete the learning experience. Simple experiments that students can perform have been included when applicable. In addition, the teacher is provided with a step-by-step outline of suggestions on how to implement the activity. An optional section in each component entitled "Home and Community" provides projects for extending the skills and knowledge gained to those areas. (NCR)