The Region 12 school budget is up for a vote on May 7th.  The $22.8 million budget is a 4.5 percent increase over the current year's budget.  The new agriscience program at Shepaug Valley High School will be coming online in the upcoming year.  The Region 12 Board of Ed, which has representatives from Bridgewater, Roxbury and Washington, says the school system will generate revenue from the tuition-in and agriscience programs.  The board expects more than $770,000 will be credited to the towns.  But the budget includes debt for the renovated Shepaug science labs and Agriscience addition.