Harbinger Center is a non-profit charitable organization created and managed by teachers. It offers 6 and 12-week SAT…More preparation classes or 6-day intense workshops; English for adults—beginner through advanced level, including accent reduction;  advanced math K-12;  CBEST preparation—one-on-one or small groups; Russian for children and adults with a free first class option. The tutoring center provides small class environment of up to 12 students and on-going sessions of the above programs.  </p> <p>Harbinger Center is in the process of moving from its present location to St. Joseph's Catholic School at 10120 North De Anza Blvd. </p>