(Olympia, WA)  --  A bill that's aimed at easing the shortage of substitute teachers in Washington is making its way through the Legislature.  The House has passed the measure, which would allow school districts to hire retired teachers without putting their retirement benefits in jeopardy.  Under the bill, teacher retirees would be able to work as substitutes for up to 630 hours per year without suspending their pension benefits.  The bill moves to a Senate committee for consideration.