(CBSNews.com) - A week after Los Angeles schools learned that high school students had hacked into their new school-issued iPads to get onto Twitter and other social media sites, officials asked students in some schools to return the Apple tablets.
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The Los Angeles Times reports this week that officials took back iPads from students at Westchester and Roosevelt high schools and possibly other campuses.
One teacher told the newspaper that only about two-thirds of the 2,100 tablets were immediately returned.
Last week, officials acknowledged students had breached the security. At the time they said students would no longer be allowed to take the iPads home. But they said then the iPads would still be used in the classrooms.
The students discovered they could delete their personal profile information easily and gain access to previously blocked social networking sites like YouTube, Twitter or Facebook.
They was among the first to receive the iPads, as part of a $1 billion program to get tablets to every student in the nation's second-largest school system within a year.
School officials are now focused on making sure students use the iPads for school work only.