Parallel or opposing blades for the best mix of air in VAV systems? What about deploying filtration only when you really need it, thereby avoiding unnecessary pressure drop? Include some ideas about economizer control and another vote for CO2 sensors and demand-controlled ventilation, and you've got some worthwhile - if not always traditional - answers for airside controls blowin' in the wind.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.