April 11 (Reuters) - An Oklahoma school board is set to vote on Tuesday on whether the state will allow the first taxpayer-funded religious charter school in the U.S. - a decision that promises to ignite a legal battle testing the concept of separation of church and state. The Statewide Virtual Charter School Board will vote on an application backed by the Catholic church for the creation of St. Isidore of Seville Catholic Virtual School, planned by its organizers to offer an online education for kindergarten through high school initially for 500 students and eventually 1,500. The board is a state entity that considers applications for charter schools - publicly funded but independently run - that operate virtually in Oklahoma. Laser disagreed and said her organization would fight the Catholic church in any court over St. Isidore and any other publicly funded religious school. "There is an attack being waged on public schools in Oklahoma, and that attack is to convert public schools into religious schools," Laser said.

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