From North:

Rt. 3 South; off at exit 16B (S. Weymouth).
South on Rt. 18 through 1st set of lights;
Left at 2nd set of lights to Park Ave. (Dunkin Donuts on right, Blockbuster Video on left).
Left at One Wildcat Way. 

From South:

Rt. 3 North; off at exit 15 (Derby St.)
Turn right off exit ramp (go over highway)
Follow to second set of lights (Pleasant St.)
Weymouth High School One Wildcat Way is the first right after the light.