| 1 Membership is the count of students enrolled on October 1 of the reported school year. |
| 2 Operating schools include all those providing services during the reported school year. |
| 3 Added schools are reported for the first time although they have been operating for more than one year. |
| 4 Schools that changed agency are affiliated with a different local education agency than that reported in the previous year. |
| 5 New schools opened for the first time within the school year reported. |
| 6 Inactive schools are closed temporarily and expected to reopen within three years. |
| 7 Future schools are expected to open within two years. |
| 8 Shared time schools provide instruction on a regular basis to students whose membership is reported for some other school. |
| NOTE: Table includes the 50 states and the District of Columbia. Charter status is independent of school type; charter schools are included in the school type totals. |
| SOURCE: U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), "Public Elementary/Secondary School Universe Survey," 2005–06, Version 1a. |