Monday the state changed the way it evaluates educational progress among its public school students. The Board of Education approved state-based standardized tests. The move is a step away from tests that draw national comparisons. The board did make one change in the proposal today before voting on it. Schools will be allowed to give a national reference test on a voluntary basis in grades two through nine if the Legislature approves money for it. That was on a request by a new member Randy Lawson of Bentonville, who emphasized the need to compare Arkansas students with students from other states around the country. ------ Proponents of the state-only test said the idea was based on extensive research and public comment. Business leaders said they were worried about a testing project that did not provide for measuring the progress of Arkansas students against other students across the country.