NASHVILLE (AP) - Tennessee lawmakers are moving toward assigning letter grades to public schools.

Under the bill sponsored by Republican Rep. Glen Casada of Franklin, schools would be assigned grades A through F.

Supporters said the current system of rating schools on a scale of one to five can confuse parents who may not know that the lower numbers are worse scores.

The House voted 74-14 to pass the bill on Thursday. The Senate had unanimously approved the bill last year, but would have to agree to a change made by the lower chamber before the measure can head for Gov. Bill Haslam's desk.

The House version would leave it to the executive branch to develop the grading system, while the Senate would assign that task to the State Board of Education.