USTIN, Tex. — Security was tight when Texas State Board of Education members were given results last fall from a field trial of a new statewide achievement test. Guards stood outside their locked meeting room, and board members were asked to sign a secrecy pledge, reflecting the sensitivity of the situation."The results were grim," said Chase Untermeyer, a member. "Few students did well. Many students got almost no answers right."Fearing that thousands of students would fail the new test and be held back a grade, and that hundreds of schools could face penalties under the federal No Child Left Behind...