These curriculum materials in U.S. history are part of a series designed to teach critical thinking skills systematically. The teacher's guide presents a series of supplementary ready-to-use lesson plans for teaching high school students about the Spanish-American War, the Depression era, the cold war, and post-World War II issues. The introduction presents a rationale for the "history and logic" project (HAL) and points out differences between the HAL approach to critical thinking and the inquiry method. The introduction is followed by a guide to critical thinking, which offers an explanation of types of arguments in history, examples of fallacies, a checklist for evaluating evidence, a method for analyzing value positions, ways of identifying assumptions, and models for analyzing arguments. Other methodologies include problem worksheets, debate topics, and analyses of interpretations in which students are presented with rival interpretations of historical events, rewritten at a high school vocabulary level. The teacher's guide includes a rationale for the program, detailed lesson plans keyed to student booklets, answer keys, test questions, a chart of critical thinking skills taught in each lesson, and difficulty-level coding. A separate section (the source "envelope") contains an outline of the guide to critical thinking skills, a unit on the Bermuda Triangle, introductory worksheets, extra problems, and test questions. The student booklet contains supplementary lessons keyed to lesson plans in the teacher's guide. Lesson topics include: the Spanish-American War and China; the Yellow Press; American imperialism; World War I; Lusitania; U.S. entry into World War I; the Sacco and Vanzetti case; the 1920's; causes of the Great Depression; proposals for the New Deal; the New Deal and recovery; the atomic bombing of Japan; origins of the cold war; the Cuban missile crisis; the Vietnam War; McCarthyism; black mobility; "Brown v. the Board of Education"; President Eisenhower; pollution and energy; and women in the work force. (LH)