classroom {WWGbook} | R Documentation |
The Study of Instructional Improvement (SII; Hill, Rowan, and Ball, 2004) was carried out by researchers at the University of Michigan to study the math achievement scores of first- and third-grade students in randomly selected classrooms from a national U.S. sample of elementary schools.
data(classroom)
A data frame with 1190 observations on the following 12 variables.
Hill, H.C., Rowan, B., and Ball, D.L. (In Press). Effect of Teacher's Mathematical Knowledge for Teaching on Student Achievement, American Educational Research Journal, Learning Mathematics for Teaching (LMT) Project.
West, B., Welch, K. & Galecki, A, Linear Mixed Models: A Practical Guide Using Statistical Software, Chapman Hall / CRC Press, first edition, 2006.
attach(classroom) #### Boxplots for Figure 4.2 classroom.first8 <- classroom[classroom$schoolid <= 8,] par(mfrow=c(4,2)) for (i in 1:8) {boxplot(classroom.first8$mathgain[classroom.first8$schoolid==i] ~ classroom.first8$classid[classroom.first8$schoolid==i],ylab="Mathgain", xlab="classid" )}