Voters in the Twin Falls School district will be heading to the polls today.   At issue is a two year school levy of $7.5 million dollars. That means for a home valued at $150,000 it would be about an additional $100 a year on that property tax bill. The money would be used for helping with the cost of maintaining and operating district schools for two years plus the restoration of as many student-teacher contact days as possible. Polls are open from 8 until 8. You will need to bring your I.D to the polls. Three other school districts are also holding bond elections today.  Cassia County voters will decide on a  $41.5 million bond to build three new schools and update other facilities. Gooding voters will decide on a two-year renewal of $325,000 of yearly maintenance and operations costs.  Jerome voters will be asked to approve a one-year renewal of $650,000 of yearly maintenance and operations costs.