First published in 1974. This book defines the slow learner, identifies the size of the problem presented by them, and outlines the responsibility of the ordinary school for their education. Then, successfully, characteristics of slow learners are reviewed and re-stated in a way relevant to their education; research on the post-school experience of slow learners is summarized and related to the curriculum; and general curriculum literature is reviewed in presenting a plan for the continuous development of curricula for slow learners, consistent with the modern approach to curriculum development.