(Portland, OR)  --  A 750-million-dollar Portland Public Schools bond measure won't get on the ballot in November as previously planned.  School board members say the measure will wait to go before voters until May because of current efforts to find an interim replacement for departed Superintendent Carole Smith.  Smith recently announced she was leaving the superintendent's post immediately rather than at the end of the next school year.  The bond package would include money to modernize four schools and address environmental health and safety problems throughout the school district.