Rena Gluck, a dancer, choreographer and educator who was instrumental in creating Israel’s Batsheva Dance Company, the country’s pre-eminent dance troupe, died on Jan. 13 at her home in Tel Aviv. Her twin brother, Milton Gluck, died on the same day, at a hospital in Manhattan.

In Israel, Ms. Gluck introduced a rigorous dance technique, honed through years of training with American modern-dance pioneers, including Martha Graham, who had been her teacher at Juilliard. After 16 years with Batsheva, Mr. Gluck served in various roles at the Jerusalem Academy of Music and Dance, including dean of the dance faculty, head of the dance school, chairwoman of the dance department, and professor. In 2007, she received a lifetime achievement award from the Israeli Ministry of Culture and Sport for her contributions to dance.