In this set of four supplemental tables, the authors compare the baseline test scores of the treatment and matched control group samples observed in each year after KIPP entry (outcome years 1 to 4). As discussed in Chapter III, the authors used an iterative propensity score estimation procedure to calculate each student's probability of entering KIPP in fifth or sixth grade, and then applied nearest-neighbor matching (without replacement) to identify a matched comparison group of students similar to KIPP students in terms of observed demographic characteristics and prior achievement at baseline. In that chapter, the authors also showed that the mean baseline math and reading scores of KIPP students in each of the 22 schools are not significantly different from their matched comparison students at the five percent level (see Table III.1). (Contains 1 footnote and 4 tables.) [This report was submitted to KIPP Foundation. For the accompanying document, see ED511107.]