The Smithtown school board today will adopt a proposed $239.4 million budget for the 2017-18 school year.

Under the budget, class size for kindergarten through second grade would be capped at 25, and class size for third through fifth grade would be capped at 26.

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The budget would also fund enhancements to advanced placement and special education programs, teacher training and new sports coaches.

A tax levy increase of 1.733 percent would fund spending, bringing property taxes on a typical home assessed at $6,000 up $161.43 to $9,477.34.

A budget hearing is scheduled May 9, and the budget vote is May 16.