By Max Zimbert Published: Last Updated Tuesday, March 9, 2010 9:06 PM PST A Burbank Unified School District teacher turned herself in Monday for having sex with a 14-year-old student from March to September last year, police said. Amy Beck, 33, a sixth-grade teacher at Jordan Middle School, surrendered Monday afternoon to Burbank police with her lawyer, and was being held on $400,000 bail, Burbank Police Sgt. Robert Quesada said. “We’re still trying to piece everything together, what happened, where, what kind of sex acts, how many, and how long it’s been going on,” he said. “She walked in with...