LISBON — The School Committee on Monday approved raising $1.65 million in additional local funds for the proposed 2017-2018 budget.

A public hearing on the budget is set for 7 p.m. Tuesday, May 9, at Lisbon Community School.

That decision means the School Department exceeds the state’s Essential Programs and Services funding model by approximately $590,000.

The increase includes extra co-curricular activities, teacher retirement benefits, substitute pay, special education services, and lunch expenses that are not covered by the state.

The proposed budget is $15.73 million, or 2.68 percent more than this fiscal year, which ends June 30. The proposed local increase in taxes is $535,913.

The budget reflects an 80 percent decrease in funding for adult education because of loss of loss of revenue.

“You have to have at least three programs for adult education and currently, we don’t have three programs,” Superintendent Richard Green said. “So we may or may not even be able to offer an adult education program.”

This potential loss would result in a decrease of $10,000 to the budget.

The School Committee also voted to transfer $50,000 from the unassigned fund balance to the Capital Reserve Fund for new security cameras.

At the urging of Green, Technology Director James Churchill looked at the situation and said Lisbon Community School is the top priority for new cameras, which were installed in 2004.

In other business, the School Committee:

• Voted to adjust the passing grade at Lisbon High School to a 2.5, effective immediately. The previous passing grade was 2.8.

• Approved an increase of the graduation credit requirements for Lisbon High School to 22 credits for the Class of 2020 and onward. The current graduation requirement is 20 credits.