Standard&Poor's Ratings Services assigned its 'A+' long-term rating to Southern Kern Unified School District, Calif.'s series 2015A general obligation (GO) bonds. At the same time, Standard&Poor's affirmed its 'A+' underlying rating (SPUR) on the district's GO bonds outstanding. The outlook is stable. The ratings reflect our view of the district's: Stable area economy and significant inter-year assessed value (AV) growth, anchored by new alternative energy projects and a strong military-related service presence in the Antelope Valley; Growing average daily attendance (ADA) trend driven in part by program investments and new management policies related to student retention; and Strong financial flexibility and maintenance of very strong available fund balances. In our opinion, the preceding credit strengths are