Charter schools receiving federal start-up and replication funds can use "weighted lotteries" that favor low-income or educationally disadvantaged students to produce more integrated schools.
Are they helping or hurting?
The judge in Washington state allows charters to open but restricts state funding to them.
See which districts have the biggest "market share" of students.
There is less than meets the eye in well-publicized studies.
Sometimes you find things in unexpected places.
A series of scandals reveals fundamental problems with charter set-ups in some states.
D.C. public charter schools will soon be giving new standardized tests to very young children -- aged 3, 4 and 5 -- for high-stakes purposes.
Florida Education Commissioner Tony Bennett pushed for a change in Indiana's school grading system to ensure that a favored charter school got an "A" when he ran the schools in that state, an AP story says.
Text of Duncan's speech at charter school convention in Washington.