A Guide to the Theory, Administration and Interpretation of the Southern California Scales of Development Scales of Cognition Second Edition takes a detailed look at the theory behind the scales of cognition as well as how to score and interpret the results. The results indicate where the students assessed are functioning across the developmental spectrum from infancy through formal adult logic in a manner that is age independent. The Guide details how to use the Scales with numerous groups of students with special needs, ranging from students with intellectual disabilities, physical disabilities, learning disabilities, autism, bilingual students and others. Cognition and language development is described with practical applications for working with preschool age students. Educational and vocational implications of the various levels of cognitive development are presented. Recommendations are suggested. One-third of proceeds will be donated to the United Cerebral Palsy Association of Hawaii.