Exhibit development, as conceived in this report, is an evolutionary process, drawing the museum visitor into the collaborative venture of testing and improving the exhibits. The findings of contemporary learning research were put to work in the arrangement of activities and specimens that engaged children through self-instructional sequences. The series of learning stations, which dealt with concepts about animals' teeth, was accomplished in two phases. After each, the effectiveness of the series was measured in game-like tests given to several hundred children both before and after viewing the exhibits. Results showed that gains from pretest to posttest were highly significant. The learning effect appeared fairly uniform for all age groups and for boys and girls. The report concludes with a consideration of the findings and observations in relation to exhibit effectiveness research and possibilities for further development. (Author/KJ)