A survey of the past 100 years of curriculum development in the United States reveals a series of changes in curricular practice and philosophies. This document reviews those trends in curriculum change, according to historical time periods. Discussed in the section covering 1880-1910 are the Herbartian and Romantic philosophies, the Baltimore Plan for Individualized Instruction, John Dewey's Laboratory School, the Gary Plan for Individualized Instruction, and the Social Utility Movement. Trends and practices cited as occurring during 1910-1940 include the Essentialist movement, the Progressive philosophy, Ellsworth Collings' Experimental School, the Dalton and Winnetka Plans for individualizing instruction, Scientism Movement, Reconstructionism, Social Frontierism, Harold Rugg's Bootstrap Curriculum, and the "Building America" textbook series. A discussion of 1950 to the present includes Traditionalism, "Life Adjustment Education,""Discipline Centered Curriculum," Humanism, Educational and Social Criticism, and Reconceptualism. An accompanying chart depicts curricular practices and policies over the last century. (CJ)