FILE - In this April 2, 2014 file photo, Pre-K students use electronic tablets at the South Education Center in San Antonio. As Gov. Rick Perry wraps up a record 14 years on the job, Republican Greg Abbott and Democrat Wendy Davis are both vowing to make public schools a top-line agenda if elected in November. Following through could make public schools a signature issue for a Texas governor as it was under George W. Bush, before he left for the White House and used the state’s testing system as the framework for No Child Left Behind. (AP Photo/Eric Gay, File)

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