A teacher assists a student in her third-grade classroom.
Testimony closed yesterday in a hotly contested trial over teacher tenure. The case in L.A. County Superior Court is Vergara v. State of California, filed on behalf of students in six public school districts across California by Students Matter, a non profit backed by a Silicon Valley businessman. Adolfo Guzman-Lopez of KPCC explains what's at stake. Reporter: Adolfo Guzman-Lopez