Project FROG designs and custom- fabricates modular classrooms and other commercial buildings that feature high-performance envelopes, natural daylighting, high-efficiency mechanical systems, healthy materials, and green components. Built using central “spines,” different-shaped wings, porches, and mechanical rooms, these modular units come in a wide range of price points, from relatively affordable trailer alternatives to state-of-the-art, net-zero-energy, LEED Platinum classrooms. Project FROG’s modular buildings can be assembled quickly with almost no construction waste, are sturdy enough for Zone 4 seismic areas, and can withstand 110 mph winds. Project FROG, Inc.; San Francisco, CA. 415-814-8500; www.projectfrog.com