A lawyer representing some of the 385 California high-school students whose Advanced Placement test scores were canceled because of lax proctoring and several incidents of cheating has sued the Educational Testing Service, which administers the tests, the Los Angeles Times reported this morning.

Ten students who took the tests at Trabuco Hills High School, in Orange County, have admitted they cheated, and some proctors were seen reading, sleeping, or leaving the room. In addition, the Times reported, proctors permitted the students to talk, look at their notes, and send text messages.

Students and parents have protested the decision to cancel all of the students’ scores when only a handful are accused of cheating.

But a lawyer representing ETS sent a letter to the lawyer for the students saying that the organization “is not required to prove that test takers cheated as a prerequiste to canceling scores.”

The students have the opportunity to retake their tests in August. ETS will be sending independent monitors. —Beckie Supiano