Purposes of the study were (1) to construct science lessons to teach selected intellectual skills to kindergarten children, and (2) to develop group non-reading tests which would measure the growth of the intellectual skills of observation, classification, data treatment, and measurement in kindergarten children. Lessons and evaluations were written by the author. Each lesson was evaluated by science faculty members of Illinois State University. Data were secured from children's test scores and analyzed to determine whether or not the children had made significant gains toward meeting the objectives of the study. The major findings included the following: (1) The lessons were effective in helping kindergarten children develop selected intellectual skills considered a part of the scientific endeavor, (2) the instructional materials used were effective in helping children meet the objectives of the study, (3) these materials appeared to have a positive effect on reading readiness scores, and (4) testing methods used were appropriate ways of assessing concept and skill development in kindergarten children. (BC)