Take Route 128 South or North to exit 33A Cambridge Rd.(route 3 south).  Take a right of the exit towards Winchester and pass through 4 sets of lights, the final set being the intersection of Cambridge Rd. and Bedford Rd.  Continue to follow Cambridge Rd. (about 1 block) until you see Locust St. on your left.  Take that left and the Joyce Middle School will be down the street on your left.