Examined the nature and stability of teacher ratings of early learning-related social skills in 72 preschoolers (3 to 4 years old) and again 1 year later. Confirmatory factor analysis using structural equation modeling revealed that a construct labeled "learning-related social skills," tapping self-control, cooperation, assertion, and mastery behaviors (including planning, organizing, and self-regulation skills), emerged and showed moderate variability. Ratings were relatively stable over a 1-year period. (Author/KB)