DES MOINES, Iowa (AP) – The Iowa House has approved a measure that would prohibit local schools from beginning classes before the fourth Monday in August. Backers say the measure approved Tuesday takes into account Iowa’s farm-based economy by keeping summer open for activities like the state fair and farming. Opponents say the state shouldn’t meddle in matters best left to local school officials. Current law says local schools can’t begin the academic year until after Sept. 1, but they are allowed to seek waivers from that requirement.  Many school districts seek the waiver and area allowed to begin earlier.  The measure cleared the House by a 54 to 44 vote and now goes to the Senate.