This collection of short articles--summaries of materials presented at an October 1981 seminar--focuses on the probable impact of tuition tax credits. An introductory article summarizes arguments for and against. The second pair of articles present highlights of a debate between Chester Finn and Albert Shanker. In addition, 15 brief articles look at these aspects of the tuition tax credit controversy: uniformity and diversity as democratic ideals for schooling, the emergence and meaning of private education, the public interest in education, constitutional issues, the importance of the private sector of education, the question of whether the benefits of tuition tax credits would be equitable, the importance of how a system of private and public schools sorts students into groups, possible increased regulation resulting from additional public support of private schools, the unrecognized difficulties of comparing the efficiency of public and nonpublic schools, estimations of enrollment shift resulting from tuition tax cuts, the differences in student achievement between public and private schools, the projected cost of tuition tax credits, public financial support for nonpublic education in other countries, future impacts of tuition tax credits (especially regarding the promotion of the homogeneous school), and the case against tuition tax credits. (Author/JM)