This study describes and evaluates an intermediate grade self-instructional unit in population geography organized according to the Forced Inferential Response Mode (FIRM) method of presentation. This mode of presentation is compared with a conventional narrative mode supplemented with graphics. The study indicates no statistically significant difference in pupil achievement on the criterion post-test when both modes are compared. Six chapters comprise the study: 1) Background to the Study; 2) Review of the Literature; 3) Development of Materials Used in the Study; 4) Procedures and Methodologies; 5) Findings and Discussions of the Findings; and 6) Summary, Conclusions and Implications of Further Research. Ten appendices, including a bibliography, are included in the work. (FDI)