Texas Republican Gov. Greg Abbott signed legislation on Saturday to create a $1 billion fund for school voucher programs — the largest day-one school choice bill in the nation’s history.

Abbott was joined by Lt. Gov. Dan Patrick, Texas House Speaker Dustin Burrows, the bill’s author State Sen. Brandon Creighton, and school choice advocates. The governor celebrated the bill’s passage by a vote of 85-63 in the Texas House two weeks ago.