GRANTVILLE, Pa. (AP) — Gov. Ed Rendell ratcheted up the pressure on school boards to sign on to a $1 billion property-tax reduction program, saying state lawmakers might otherwise make the program mandatory. School boards, which have until the end of May to opt in, have been slow to participate. In exchange for the future slots revenues, they must raise local income taxes and seek voter approval for future property-tax increases that exceed inflation. "We may mandate it, there's so much anger in the Legislature. We may mandate it without some of the exceptions that are worked in, and that...