sentences:  In 1989, the school began to offer single-gender classes whenever class enrollment was sufficient.In 2003, Maharishi School split into three schools with gender divisions that included the Boys‚ Middle and Upper School, the Girls‚ Middle and Upper School and the Lower School, grades K-6.In 1996, after eight years of single-gender classes, Maharishi School and two Iowa school districts were advised to "discontinue gender-segregated classes".