Microsequencing is the ordering of subject matter according to the prerequisite knowledge required of each unit of content. "This assumes," said Orlosky and Smith, "that for any learning task there is a hierarchy extending from the very simple to the more abstract and complex elements which lead to the attainment of a specified objective. Curriculum planners are called upon to make decisions on placement of content at the appropriate grade levels. Using the terms "sequence" and "grade placement" to- gether, B. Othanel Smith, William O, Stanley, and J. Harlan Shores observed: There are only two possible approaches to the solution of problems of grade placement and sequence. The first accepts the child as he iş and adjusts the experience to his level of development while holding the instructional goals constant... The second approach as- sumes curriculum experiences to be located at a given grade level and provides learnings to adjust the child to these experiences-that is, to get him ready for the learning.