The Cobb County school system plans a series of meetings to discuss a proposed tax hike for the next school year.

The system has tentatively adopted a general fund millage rate of 18.90 mills. To collect the same revenue as last year and avoid an increase in taxes of nearly 6 percent, the millage rate would have to be decreased to 17.825 mills, the “roll-back” rate.

The additional revenue will be applied toward the higher cost of student instruction due to enrollment growth, and to ease budget constraints caused by reductions in state revenue, according to a statement the Cobb school system released.

When property values and tax assessments rise, more revenue would come without a tax rate increase. Georgia law requires the school board to conduct three public hearings if it does not adopt the “roll-back” millage rate.

All residents are invited to public hearings July 9, 8:30 a.m. and 6 p.m., Suite #140 - 590 Commerce Park, Marietta.

There will also be a public hearing July 22, 8:30 a.m., 514 Glover St., Marietta. Following that hearing, the Cobb school board will establish the millage rate at a meeting.