Factory built modular buildings can be not only equal to or superior to traditional buildings in quality, but the controlled manufacturing process greatly minimizes energy and material waste typical to site construction. Modularity of the construction system allows relocation and future re-use of the building without typical demolition and disposal waste of materials and embedded energy. High quality windows, shading devices and directed wind scoops, vented skins and high-performance insulation and sealants reduce heat gain, which reduces energy waste, pollution and release of greenhouse gasses. A high-quality white rubber roof and solar-shaded, low emissivity glazing and reflective metal ventilated skins reflect solar heat gain away from the building to keep it comfortable in hot weather and reduce heat-island warming of adjacent buildings and outdoor spaces. Occupancy sensors “learn” patterns of activity and optimize settings to conserve energy and maintain comfortable levels appropriate to daily cycles of use. Coordinated sensors and electronic control of the lighting system turn off lights when there is no activity in the room. The PV array on the roof surfaces shades the roof surface with a ventilation space below, and generates four times the energy demand expected in the classroom, even while using substantial digital teaching technology and building performance monitoring systems.