Five hundred second-grade pupils participated in a study of the effect of the Allain Color Pack reading system on reading achievement. Subjects were divided into equal treatment and control groups; each group was stratified according to low, average, and high reading ability determined on the basis of pretests of vocabulary and comprehension. The experimental group received the Allain treatment for 5 minutes a day for four months, as an adjunct to their regular reading program. The treatment consisted of exposing pupils to a 260-word sight vocabulary, through the use of word, phrase, and sentence flash cards with correlated readers. Analyses of results indicated that children who used the Allain Color Pack reading system had significantly greater reading achievement; that more subjects in the treatment group than in the control group shifted out of the low-ability reading level into the average and high reading-ability levels; and that subjects in the treatment group made greater gains in both vocabulary and comprehension. (Author/AA)