Techiya, MIT’s Jewish a cappella group, sings “Sisu et Yerushalayim” at the Greater Boston Invitational Songfest on Saturday. GBIS is an annual concert held during Parent’s Weekend that showcases all of MIT’s a cappella groups. Diana Ye—The Tech May. 9, 2016 Facebook Twitter Reddit Print Techiya, MIT’s Jewish a cappella group, sings “Sisu et Yerushalayim” at the Greater Boston Invitational Songfest on Saturday. GBIS is an annual concert held during Parent’s Weekend that showcases all of MIT’s a cappella groups. Diana Ye—The Tech