village or city, as the village of Fox Crossing did in 2016, or as the village of Kronenwetter did in 2002–2003. See also urban town, a proposal for semi-incorporation of more urbanized towns. Unincorporated communities There are numerous examples of unincorporated communities throughout the state. These areas are administered by the town or municipality in which they exist. They serve as useful local reference to specific places and are sometimes included in vital records. Many of these named places contain a small cluster of houses, a church or local business such as store or tavern. Although they do not have any governmental function, most are recognized for the common usage and are marked with official green informational highway signs listing the place name with the word 'Unincorporated' underneath. Many of these named places are also placed on the official Wisconsin state highway maps issued by the Wisconsin Department of Transportation but these names were not listed in the index on the same maps until several years ago. Examples include Frog Station, Poland, and North Leeds. Special purpose units of government In Wisconsin, special purpose units of government provide specialized services for those who live within the district. They are empowered to tax residents of the district for the services provided in common. Special districts often cross the lines of cities, villages and towns. In 2006, Wisconsin had over 1,100 special districts. These special units of government are created to address issues that are regional in nature, and sometimes to bypass the limits on debt that each municipality may have. The state can also exert more control on special districts through the governor's appointments to district boards. Politicians also set up some special districts to insulate themselves from the sometimes unpopular taxes these boards levy, since the boards are often appointed and not elected. School districts School districts are the most common kind of special district. They provide, arrange or contract for all public education services, including special education and school transportation, the latter also for non-public schools. In 2006, Wisconsin had more than 440 school districts. School districts are often not precisely co-extensive with municipalities that bear the same name, meaning that a child living in a municipality might attend a school associated with a different municipality, or even a different county. Residents pay school taxes to the same school district in which they live and in which their children