Two Chicago Sun-Times staffers have won top honors in the National Awards for Education Reporting competition.

Reporter Dan Mihalopoulos won the top prize for investigative reporting among large news organizations for stories that exposed insider deals worth millions of dollars involving family members of top administrators of the taxpayer-funded, privately run UNO charter schools. The stories led to a cutoff of millions of dollars in state funding and the ouster of the two top officials of the clout-heavy United Neighborhood Organization.

Deputy editorial page editor Kate N. Grossman won the top prize for opinion writing for a series of editorials on school closings in Chicago.

The awards are given annually by the national Education Writers Association.