Table 2-1. Features of DC private schools by OSP participation status, years 1 and 2

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Item	Participated year 1	New participants year 2	Total participants year 2	Nonparticipants year 2
Percent with average tuition ^a above $7,500	31.0 ^b	88.9 ^**	38.8	73.7 ^**
Average size (student enrollment)	204.0	418.4 ^**	236.0	137.6 ^*
Percent serving high school ^c	17.2	50.0 ^*	22.1	32.4
Average percent minority	81.2	35.3 ^**	76.2	56.6 ^*
Average student/teacher Ratio	10.9	8.5	10.6	7.8 ^*
Total N	58	10	68	36
^a For schools that charge a range of tuitions, the midpoint of the range was selected. Tuition rates were unavailable for 8 of the participating private schools and 26 of the nonparticipating private schools. ^b Three schools charged no tuition either because of foundation support or because the school serves groups such as DC-placed special education students funded by the government. ^c Schools were classified as serving high schools if they enrolled students in any grade 9–12. ^* The difference between groups is statistically significant at the 95 percent confidence level. ^** The difference between groups is statistically significant at the 99 percent confidence level.
SOURCES: Data on participating private schools drawn from "School Directory, D.C. K–12 Scholarship Program, 2004–05 School Year," and "School Directory 2005–06, D.C. Opportunity Scholarship Program," Washington Scholarship Fund, June 2004 and April 2005, respectively. Data on both participating and nonparticipating private schools were also obtained from school websites.