Atlanta International School Early Learning Center (AIS-ELC) is a 17,231 square foot, two-story pre-school that was certified in the EarthCraft Light Commercial (ECLC) green building certification program. The school partnered with Southface to analyze building design and performance through the U.S. Department of Energy sponsored Advanced Commercial Buildings Initiative. Actual performance data of AIS – ELC was collected with circuit-level energy monitors and temperature sensors deployed in the building for one year post-occupancy. Southface studied hourly energy simulation modeling and building monitoring data to assess the actual performance of efficiency strategies implemented at the school.