SYDNEY, June 13 - Prime Minister Julia Gillard's improved schools funding offer to Western Australia appears to be in breach of the agreement she signed with New South Wales, Premier Barry O'Farrell has said. He said Gillard promised that her offer to other jurisdictions would not change when NSW became the first state to sign up to Labor's $14.5 billion six-year schools funding plan in April. But on Wednesday she trebled her offer to WA, saying she had underestimated the cost of running its education system. "Certainly the minister for education [Adrian Piccoli] is pursuing with the Federal Government what appears to be a breach of the agreement that was signed with NSW," O'Farrell told reporters on Thursday. "At the press conference the Prime Minister clearly said the same deal that NSW was signing up to was available to other states and territories, no better, no worse." So far only NSW and the ACT have signed before the June 30 deadline set by the Prime Minister. The deal delivers $3.27 billion in commonwealth funds for NSW schools over six years, starting next year. The State Government must find savings in its budget to round out the total funding boost to $5 billion. Opposition Leader Tony Abbott had urged O'Farrell not to sign up to the reforms. AAP