Parents Revolt Against Failing Schools is a good overview of parent trigger efforts, and it’s published by the Pew Charitable Trusts.

Here’s an excerpt:

Several attempts sparked bitter controversy, with parents claiming they had been misled by parent trigger organizers.

Because parent trigger laws are so new, there is little research-based evidence on their effectiveness. Even Phelps acknowledged it is too early to tell just how effective parent trigger laws really are.

A 2012 policy memo by the National Education Policy Center, which produces peer-reviewed research on education policy, concluded that parent trigger laws are too new to evaluate. But the center noted a large body of research on the typical outcomes of parent triggers, such as charter schools and governance changes, which indicate that such changes are “not likely to yield any benefits.”

Janelle Scott, an associate professor at the University of California at Berkeley, who was one of the authors of the NEPC policy memo, said she would advise lawmakers considering adopting parent trigger laws to “proceed with more deliberation.”