The State Board of Education urged the Legislature on Thursday to approve the governor’s proposal to bolster state revenue and shield education from "devastating cuts.” Six school superintendents from across the state presented to the board Thursday their "worst case” budget scenarios under the proposed 10 percent cut being considered by the Legislature. "The sad thing is that many of them have already cut the areas outside the classrooms, but now they are cutting into bone,” state schools Superintendent Sandy Garrett said. "We have more mandates on the table — many of them reforms that we have worked hard to see — that are being weakened, if not moved off the table completely.” Garrett said finding a new source of revenue — such as Gov. Brad Henry’s recommended suspension of tax credits or exemptions and increased taxation of Internet sales — could be the missing pieces that prevent education advancements from being set back decades. Henry’s plans to raise revenue include tactics such as ending selected tax credits and refinancing bonds at a more favorable rate. The plan could raise an additional $725 million and reduce the 10 percent cuts across the board to 3 percent, and 0.5 percent for public schools. That proposal still is being discussed in the 2011 budget negotiations with the Legislature. "The reality is, unless we are willing to address revenue enhancement in the state of Oklahoma — eliminating some of the opportunities for tax aversion — we are going to undo years of advancement in education,” said Superintendent Jerry Needham of Oktaha Public Schools. That district already has laid off four employees because of fiscal shortfalls this year. The superintendents called together Thursday said class sizes will increase while support staff decreases; textbooks won’t be updated this year; students will ride the bus longer or walk farther to school; and for at least one district the future beyond 2012 is questionable. "We are beyond the point of absorption in Norman Public Schools,” Superintendent Joe Siano said. Siano said the 10 percent cut to state aid would mean losing between 150 and 180 personnel, including between 35 and 40 teachers, counselors, librarians and administrators. Tulsa Public Schools Chief of Staff Bob Burton called his district’s position of losing 173 non-classroom positions and 225 teachers "heinous and nefarious.” "These kinds of cuts are absolutely devastating, not only to Tulsa, but to all school districts throughout the state of Oklahoma,” Burton said.