UNIT III (SIX WEEKS) CONCERNS PLANT LIFE, AND DEALS WITH THALLUS PLANTS, MOSSES, FERNS, AND SEED PLANTS. UNIT IV (SIX WEEKS) COVERS AIR AND SPACE, WITH SUBTOPICS ON ASTRONOMY AND WEATHER. "THE CHANGING EARTH," DEALING WITH GEOLOGY AND CONSERVATION, COMPRISES UNIT V (6WEEKS). THE LAST, UNIT VI (6 WEEKS), DEALS WITH CONSUMER SCIENCE--BIOLOGICAL AND EARTH. LEVEL THREE SHOULD BE CONSULTED FOR SUGGESTIONS FOR UNIT VI. THE TEACHER IS ADVISED, IN ADDITION TO THE PAGES LISTED AT THE BEGINNING OF EACH UNIT IN THE LEVEL TWO COURSE, TO REFER TO APPROPRIATE CHAPTERS IN LEVEL THREE TEXTBOOKS. THE TEACHING METHOD SUGGESTED IS TO GUIDE THE STUDENT BY ASKING QUESTIONS. EACH TOPIC HAS TEXTBOOK REFERENCES, CONTENT OUTLINE, TEACHING SUGGESTIONS, REFERENCE READINGS, AND LISTS OF AUDIOVISUAL MATERIALS.