Benny Gantz, leader of the Blue and White party, said on Thursday that, were he elected, he would abolish 12th grade and move the matriculation exams to 11th, as he unveiled his party's education plan.During his comments, made at the Education Watershed conference, he said the system requires deep change and warned the overhaul could involve a prolonged struggle that might shut schools for a year.Gantz said Blue and White will require core studies and state education for every pupil, cancel