Teacher Retirement System of Texas, Austin, is searching for an actuarial firm to provide valuations for fiscal years ended Aug. 31, 2006, 2007 and 2008, and midyear updates. The $94 billion system is required by law to rehire its actuary at least once every three years. Incumbent Gabriel Roeder Smith can rebid, confirmed Howard Goldman, system spokesman. The RFP is on the system's website at http://esbd.tbpc.state.tx.us/1380/bid_show.cfm?bidid=63345. Proposals are due March 17, and a board decision is expected in May.