Amends the Township Code, Illinois Municipal Code, Downstate Forest Preserve District Act, Park District Code, Illinois Local Library Act, Public Library District Act of 1991, School Code, and Illinois Highway Code. Provides that specified contracts may be let to the lowest responsible bidder or the best value bidder (rather than to the lowest responsible bidder). Provides that "best value" means the result determined by a procurement method that considers price and other criteria reflecting an objective and quantifiable analysis. Includes examples of such analysis.