Instruments and manuals prepared for those conducting the research of the IEA project comprise Volume II of the final report of the 18-nation study of educational attainment at the elementary and secondary school levels. Section 1 includes technical research guidelines for national centers, school coordinators, and test administrators. Section 2 is comprised of science test booklets and questionnaires. Section 3 includes testing instruments for reading comprehension and literature in the mother tongue. Section 4 is comprised of all word knowledge tests, student questionnaires and attitude and descriptive scales, teacher questionnaires, and the school questionnaire. Section 6 contains descriptions of participants in the IEA (including council members, full-time staff, consultants, international committee members) and of the institutions, technical officers, and committee members for each of the nations participating in the project. Related documents are Volume I, (EA 002 594) and Volume II, section 5 (FL 001 477). [Some illustrations may be of poor quality when reproduced.] (JK)