JERUSALEM Israel permanently closed six U.N. schools in annexed east Jerusalem yesterday, forcing Palestinian students to leave early and throwing the education of more than 800 others into question. Last month, heavily armed Israeli police and Education Ministry officials ordered six schools in east Jerusalem to close within 30 days, which ended on May 7. The United Nations agency for Palestinian refugees, UNRWA, runs the six schools. The closure orders come after Israel banned UNRWA from