On Monday morning, high school students walked past a new greenhouse built upon freshly poured concrete before filing into their agricultural science classroom, now outfitted with five gleaming stainless-steel kitchen stations. 

The additions to Tomales High School’s agricultural education center debuted this week, marking a milestone for its flourishing program that serves more than half the student body and is the only one of its kind in Marin. 

The project was years in…