The Pre-School Kindergarten Readiness Inventory (PKRI) is a brief diagnostic instrument designed to be administered by the classroom teacher. It can be administered and scored in 10 to 12 minutes. The PKRI was developed to measure abilities and skills that are regarded as necessary for success in school. These include social awareness, motor performance, and letter recognition. The most important goal was to help the teacher to become "tuned in" emotionally with the child. The results may be used to identify children who appear to need: (1) vocabulary development, (2) further diagnostic work, and (3) more work in perceptual activities. The construction of the PKRI involved item analysis based on 1,926 kindergarten pupils. The PKRI was administered for standardization purposes to approximately 2,000 children in May, 1969. More research on the PKRI measure in relation to reading success should be carried out. (Author/KJ)