An Ocean County teacher won a $25,000 national award for educators on Friday — and it was all a huge surprise. The Milken Family Foundation, which awards cash prizes to outstanding U.S. educators, stunned Shaina Brenner with its educator award during a school assembly in Jackson Friday morning. “When I woke up this morning, I definitely didn’t anticipate this,” Brenner said. Hundreds of Elms Elementary School students, all gathered in the school’s gymnasium for the assembly, stomped on the bleachers and cheered as she was surprised with the award. Brenner, a second grade teacher, never stopped…