JANESVILLE -- Blackhawk Technical College announces its spring 2010 graduates of the General Education Development Certificate (GED). Area graduates include Brian J. Holzer, GED; David E. Leu, HSED; Audra M. Martinez, GED; and Jennifer L. Thies, GED. The certificate is issued by the State Department of Public Instruction (DPI) to a student upon satisfactory completion of five exams.