Officials of the National Board for Professional Teaching Standards decided to post the report by veteran researcher William L. Sanders on the group's Web site after saying that they intended to stick with an "overview." The overview, which was largely critical of the study, appeared after the board was pressed to "publish something" by a prominent education blogger. The organization has been under increasing pressure to demonstrate that the millions of dollars states and districts spend on bonuses for nationally certified teachers buy the likelihood of greater student learning. "Based on the kind of interest that has been expressed and trying to get at concerns that people seem to think we're hiding or sitting on things, we want to be open and transparent," said Joseph A. Aguerrebere Jr., the board's president. "It's the responsible thing to do." Furthermore, Mr. Aguerrebere said that some news reporters and one of the board's 53 directors have asked about the full study.