Data from Tennessee's Student Teacher Achievement Ratio (STAR) project which was a large-scale, four-year study of the effect of reduced class size.
A data frame with 26796 observations on the following 18 variables.
a factor - student id number
a factor - school id number
grade - an ordered factor with levels
class type - a factor with levels
reg+A. The last level indicates a regular
class size with a teachers aide.
highest degree obtained by the teacher - an
ordered factor with levels
career ladder position of the teacher - a factor
a numeric vector - the total number of years of experience of the teacher
teacher's race - a factor with levels
white, black, Asian, Hispanic, Indian (Native American) and other
the student's total reading scaled score
the student's total math scaled score
socioeconomic status - a factor with levels
N representing eligible for free lunches or
school type - a factor with levels
student's sex - a factor with levels
student's ethnicity - a factor with the same
student's birth quarter - an ordered factor with
1977:1 < ... <
student's birth year - an ordered factor with levels
number of years of schooling for the student - a
numeric version of the grade
gr with Kindergarten
represented as 0. This variable was generated from
does not allow for a student being retained.
a factor - teacher id number
Details of the original data source and the process of conversion to this representation are given in the vignette.