Free Online Courses The newest courses page provides AIA HSW CE Hours, LEED specific hours, and GBCI general hours. Also, several new courses are free IDCEC online courses for interior designers. The free AIA courses and LEED certification courses are sponsored by building product manufacturers. The courses discuss sustainable design, environmental design, green building, and CSI specifications. Registered architects, LEED APs, and LEED Green Associates can maintain their credentials by taking free AIA CEU and USGBC courses about LEED certified projects. GreenCE will report all CE course completions to AIA, GBCI, and IDCEC.