Bloomberg: News Corp. is said to be winding down sales of custom-made tablet computers after few schools bought the devices, once central to the company’s goal of overhauling U.S. education. The media company reportedly is no longer ordering new tablets from its manufacturer in Asia. By the end of this month, News Corp. will have invested more than $1 billion in Amplify, its education division, which sells a digital curriculum and testing services in addition to the tablets. Few districts have bought the units. The head of the tablet business left the company earlier this year.