Standard&Poor's Ratings Services assigned its 'A+' rating to Cook County School District No. 88 (Bellwood), Ill.'s school bonds series 2010A, 2010B, 2010C, and 2010D. Standard&Poor's also affirmed its 'A+' underlying rating (SPUR) on the district's general obligation debt outstanding. The rating reflects, in Standard&Poor's opinion, the district's: Participation in the deep and diverse Chicago metropolitan area economy; Good income level; and Improved financial operations with strong cash reserves, including working cash. In our view, offsetting these credit strengths is the district's moderately high overall debt burden. The district's series 2010A, 2010B, and 2010D limited school bonds are secured by the district's debt service extension base, which is limited by amount but unlimited as to