My one-room log schoolhouse for grades 1 to 8 - about 20 students total - through my fifth grade (after which we were bused to school in Chapleau, a good hour away).
Programming activities:
Microprogramming for data acquisition on the Data General Eclipse S/230 (1982)
Vectorization of EGS4
electron+photon shower simulation package for the Convex C200 vector-register computer (1989)