This textbook is designed for English-speaking students of Spanish. The distinctive feature of a microwave course is the emphasis on communicative use of each structural element as soon as it appears. The principal component is a series of 'cycles' which, because of their extreme shortness, have been given the name 'microwaves.' This text consists of 106 cycles, each written first in English and then in Spanish. Each cycle begins with the introduction of new material and ends when that same material has been used for purposes of communication. Each cycle consists of an "M phase" and a "C phase.""M" stands for mimicry of pronunciation, manipulation of grammatical elements, learning the meaning of the words and sentences, and a certain degree of memorizing. "C" stands for connected conversation and communication. The "microwave" part of the text is supplemented by "Situational Problems" and "Debate Topics." These are to be used at regular intervals in order to allow the students to manipulate and use the verbal responses that they have learned. They also serve as an added stimulus in providing variety to the regular classroom situation. (Author/CFM)