The post-Katrina public high school situation dictated a different model for SciHigh. There were only four public high schools open after the flood. Previously, there had been 22, all of which had served as feeder schools for Sci High. The demand for a half-day program had been destroyed. Therefore, in October, 2005, a mere 60 days after the collapse of the New Orleans levee system, The Advocates for Science & Mathematics Education, Inc. applied for and was granted a Type III charter by the Orleans Parish School Board. Now the founding Advocates had the full responsibility for finances and operations of their successful model.
Responding to the new environment, the half-day program became a full-day program offering all subjects that are required for graduation. The high school moved from the Delgado campus to Allen School, a former elementary building, at the corner of Nashville and Loyola avenues.