 About 7.6% of families and 10.9% of the population were below the poverty line, including 15.3% of those under age 18 and 9.8% of those age 65 or over.There are three school districts in Clark County (Marshall, Martinsville and Casey-Westfield) with a total enrollment (2004) of 3,014 students.Each district has one high school (grades 9-12) and one junior high school (grades 7-8).