cps_equate: Create vector of imputed prior spring scores

In kippchicago/sqrpr: Chicago Public Schools School Quality Rating Policy metric calculations

Description

cps_equate returns a character vector of prior sprng scores that are imputed from fall scores. This function uses the regression coefficients that described on page 2 of the CPS Metric Guide for National School Growth Percentile (NWEA).

Usage

cps_equate(rit_score, subject, grade_level,
  cps_constants = cps_constants_2015)

Arguments

rit_score	a vector of fall RIT scores
subject	list a character vector of subjects. The only acceptable values are "Mathematics" or "Reading".
grade_level	A numeric or integer vector of grade levels. Grade levels below 3rd are ignored and the original RIT score is returned wihtout any imputation/equating performed.

Details

From the handbook: "[f]or students who do not have a valid spring pretest score but did test in the fall, thier fall scores will be equated to an equivalent spring score. This equated score will then be incorporated into the school's spring average for the purpose of calculating the spring-to-spring growth percentile" (SQRP Handbook 12/5/2014, 25).

The regression coefficients are taken from page 2 of the CPS Metric Guide for National School Growth Percentile (NWEA). Equating is only performed for grades 3-8.

Value

a character vector of length(rit_score).

Examples

cps_equate(175, "Reading", 6)
cps_equate(c(190, 175), c("Mathematics", "Reading"), c(6,7))

kippchicago/sqrpr documentation built on Dec. 15, 2019, 12:27 a.m.